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Electronics, sensors, robotics kits, PC components, peripherals — everything Unik Systems carries, in one place.
45mm 1.75-Inch 4Ohms 3W Internal Magnet Speaker with Frame
[Speakers] 45mm Internal Magnet Speaker with Frame – 4Ω 3W 45×23×23mm The 45mm Internal Magnet Speaker with Frame (1.75-Inch) is a compact and efficient audio driver designed for DIY electronics, portable audio devices, multimedia systems, toys, alarms, intercoms, and embedded audio applications. Featuring an internal magnet structure and durable mounting frame, this speaker provides clear and stable sound output while maintaining a compact form factor. With a compact size of 45×23×23mm, 4Ω impedance, and 3W power rating, this speaker is suitable for small amplifier projects and electronic devices where space is limited. Its built-in frame allows convenient installation in custom enclosures, panels, and electronic products. ⭐ Key Features 45mm (1.75-Inch) speaker size 4Ω impedance 3W power rating Internal magnet design Durable mounting frame Compact 45×23×23mm construction Clear and stable sound output Lightweight and space-saving Suitable for low-power audio applications Easy to install in custom enclosures Ideal for DIY, repair and OEM applications 📋 Technical Specifications Product Type: Internal Magnet Speaker Speaker Size: 45mm (1.75 Inch) Dimensions: 45 × 23 × 23mm Impedance: 4Ω Power Rating: 3W Magnet Type: Internal Magnet Frame Type: With Mounting Frame Speaker Type: Dynamic Full Range Speaker Audio Type: Mini Full Range Speaker Mounting: Frame / Panel Mount Application: Compact Audio & Embedded Electronics 🔧 Applications DIY Speaker Projects Portable Audio Devices Bluetooth Speaker Projects Multimedia Speaker Systems Alarm Systems Toys and Sound Modules Intercom Systems Embedded Electronics Educational Electronics Kits Replacement Speaker Repairs Smart Gadgets OEM Product Manufacturing Mini Amplifier Projects 🛠️ Installation Mount the speaker securely inside the required enclosure or panel using its mounting frame. Connect it to a compatible amplifier with an output suitable for 4Ω speakers and a power rating appropriate for the 3W speaker. Proper mounting helps reduce unwanted vibration and improves overall sound performance. 📦 Package Includes 1 × 45mm Internal Magnet Speaker with Frame – 4Ω 3W ⚠️ Precautions Match the 4Ω impedance with the amplifier output. Do not exceed the 3W rated power. Do not apply direct DC voltage to the speaker. Ensure correct wiring polarity during installation. Avoid exposure to moisture and excessive dust. Mount securely to prevent vibration and unwanted noise. Do not apply physical pressure to the speaker cone or diaphragm. Use a compatible audio amplifier module for proper operation.
2 Inch 4 Ohms 5Watt Internal Magnet Speaker with Frame
[Speakers] 2-Inch Internal Magnet Speaker with Frame – 53×29×23mm 4Ω 5W The 2-Inch Internal Magnet Speaker with Frame is a compact and efficient audio driver designed for DIY electronics, portable audio devices, alarms, toys, embedded systems, and other space-constrained applications. Featuring an internal magnet design and durable frame construction, this speaker provides clear and balanced sound output while maintaining a compact footprint. With dimensions of 53×29×23mm, 4Ω impedance, and a 5W power rating, this speaker is suitable for small amplifier projects and electronic devices requiring a compact audio solution. The mounting frame makes installation convenient in custom enclosures and equipment. ⭐ Key Features 2-Inch compact speaker design Internal magnet structure 4Ω impedance 5W power rating Durable metal frame construction Clear and balanced sound output Compact and space-saving design Easy mounting with frame and screw slots Suitable for low and medium-power audio applications Ideal for DIY and OEM applications 📋 Technical Specifications Product Type: Dynamic Internal Magnet Speaker Speaker Size: 2 Inch Dimensions: 53 × 29 × 23mm Impedance: 4Ω Power Rating: 5W Magnet Type: Internal Magnet Magnet Material: Ferrite Shape: Rectangular Frame Type: Metal Frame Cone Material: Paper / Mylar Diaphragm depending on variant Speaker Type: Full Range / Dynamic Speaker Mounting: Frame with Screw Slots Application: Compact Audio & Embedded Electronics 🔧 Applications DIY Speaker Projects Portable Audio Devices Bluetooth Speaker Projects Alarm Systems Toys and Sound Modules Intercom Systems Embedded Electronics Educational Electronics Kits Replacement Speaker Repairs Smart Gadgets OEM Product Manufacturing Mini Amplifier Projects 🛠️ Installation Connect the speaker to a compatible amplifier output matching the speaker's 4Ω impedance and 5W power rating. Secure the speaker firmly using the mounting frame to reduce unwanted vibration and noise during operation. 📦 Package Includes 1 × 2-Inch Internal Magnet Speaker with Frame – 4Ω 5W ⚠️ Precautions Match the 4Ω impedance with the amplifier output. Do not exceed the 5W rated power. Avoid applying direct DC voltage to the speaker. Avoid exposure to moisture and excessive humidity. Mount the speaker securely before operation. Do not apply physical pressure to the speaker cone or diaphragm. Avoid short circuits at the speaker terminals. Keep the speaker away from excessive heat and magnetic interference.
2.25-Inch 8ohms 8W Full Range Speaker for Compact Audio Applications
[Speakers] 2.25-Inch 8Ω 8W Full Range Speaker for Compact Audio Applications The 2.25-Inch 8Ω 8W Full Range Speaker is a compact and efficient audio driver designed for small electronic and embedded sound applications. Featuring an 8Ω impedance and 8W power rating, this speaker delivers clear and balanced sound output while maintaining low power consumption and excellent efficiency. Its compact size makes it ideal for projects where installation space is limited, including portable speakers, DIY electronics, toys, alarm systems, intercom devices, and mini speaker enclosures. The full-range design allows it to reproduce a broad range of audio frequencies, making it suitable for both voice and music playback applications. Built with durable materials and designed for reliable long-term performance, this speaker is an excellent choice for electronics hobbyists, engineers, and product developers working on custom audio projects. ⭐ Key Features 2.25-Inch compact speaker driver 8Ω impedance 8W power rating Full-range audio reproduction Clear and balanced sound output Lightweight and compact design Easy to mount in enclosures and panels Suitable for low to medium-power audio applications Durable construction for long-term use Ideal for DIY and embedded audio systems 📋 Technical Specifications Product Type: Full Range Speaker Speaker Size: 2.25 Inch Impedance: 8Ω Power Rating: 8W Speaker Type: Full Range Mounting Type: Enclosure / Panel Mount Application Type: Audio Output 🔧 Applications Portable Speaker Systems DIY Audio Projects Bluetooth Speaker Modules Toys and Educational Kits Alarm and Notification Systems Embedded Electronic Devices Mini Amplifiers and Sound Modules Intercom Systems Robotics Projects Custom Speaker Enclosures ⚠️ Precautions Do not exceed the 8W rated power. Use an amplifier compatible with an 8Ω speaker load. Avoid exposure to moisture and excessive dust. Mount securely to minimize vibration and distortion. Do not apply direct pressure on the speaker cone. 📦 Package Includes 1 × 2.25-Inch 8Ω 8W Full Range Speaker
57mm (2.25-Inch) Internal Magnet Speaker 4Ohms 3W Full Range Audio Speaker
[Speakers] 57mm (2.25-Inch) Internal Magnet Speaker – 4Ω 3W Full Range Audio Speaker The 57mm (2.25-Inch) Internal Magnet Speaker is a compact and reliable full-range audio speaker designed for DIY electronics, multimedia devices, embedded sound systems, and portable audio applications. Featuring a 4Ω impedance and 3W power rating, this speaker delivers clear and balanced sound output while maintaining a slim and lightweight design. Its internal magnet structure provides a compact profile, making it ideal for applications where installation space is limited. The durable mounting frame allows easy integration into speaker enclosures, control panels, intercom systems, audio modules, and custom electronic projects. Designed for consistent audio performance, this speaker is suitable for voice playback, music, alerts, and general audio output in both portable and embedded electronic devices. ⭐ Key Features 57mm (2.25-Inch) compact speaker 4Ω impedance 3W power rating Internal magnet design Full-range audio reproduction Built-in mounting frame Clear and balanced sound output Compact and lightweight construction Easy installation in custom enclosures Suitable for portable and embedded audio applications Ideal for DIY electronics and speaker projects 📋 Technical Specifications Product Type: Internal Magnet Speaker Speaker Size: 57mm (2.25 Inch) Impedance: 4Ω Power Rating: 3W Speaker Type: Full Range Magnet Type: Internal Magnet Frame Type: With Mounting Frame Mounting: Frame / Panel Mount Application: Embedded Audio Systems 🔧 Applications DIY Electronics Projects Audio Modules & Music Players Intercom and Communication Systems Toys and Educational Devices Portable Audio Systems Alarm and Notification Devices Embedded Audio Applications Mini Speaker Enclosures Multimedia Devices Robotics and Automation Projects ⚠️ Precautions Do not exceed the 3W rated power. Use an amplifier compatible with a 4Ω speaker load. Ensure proper wiring polarity during installation. Avoid exposure to moisture and dust. Mount securely to reduce vibration noise. Do not apply direct pressure on the speaker cone. 📦 Package Includes 1 × 57mm (2.25-Inch) 4Ω 3W Internal Magnet Full Range Speaker
45mm (1.75-Inch) Internal Magnet Speaker 2 Ohms 10W Full Range Audio Speaker
[Speakers] 45mm (1.75-Inch) Internal Magnet Speaker – 2Ω 10W Full Range Audio Speaker The 45mm (1.75-Inch) Internal Magnet Speaker is a compact and powerful audio driver designed for DIY electronics, portable speakers, multimedia devices, toys, embedded audio systems, and custom speaker enclosures. Featuring a 2Ω impedance and 10W power rating, this speaker provides strong audio output when paired with a compatible amplifier. Its internal magnet design provides a compact profile while maintaining efficient magnetic performance. The built-in mounting frame makes installation easy in custom enclosures and electronic devices. With its 2Ω low-impedance configuration, this speaker is suitable for compatible Class-D amplifier modules where higher output power is required from a compact speaker driver. ⭐ Key Features 45mm (1.75-Inch) compact speaker 2Ω impedance 10W power rating Internal magnet design Full-range audio reproduction Compact and lightweight construction Built-in mounting frame Clear and powerful sound output Easy to install in custom enclosures Suitable for portable and embedded audio applications Ideal for DIY speaker projects 📋 Technical Specifications Product Type: Internal Magnet Speaker Speaker Size: 45mm (1.75 Inch) Impedance: 2Ω Power Rating: 10W Speaker Type: Full Range Magnet Type: Internal Magnet Frame Type: Mounting Frame Mounting: Frame / Panel Mount Application: Embedded & Portable Audio 🔧 Applications DIY Bluetooth Speaker Projects Portable Speaker Systems Mini Audio Amplifiers Multimedia Devices Toys and Educational Kits Intercom Systems Alarm and Notification Systems Embedded Audio Devices Custom Speaker Enclosures Robotics Projects Electronic Projects ⚠️ Precautions Use an amplifier that supports a 2Ω load. Do not exceed the 10W rated power. Check amplifier output impedance before connecting. Observe correct speaker polarity during installation. Avoid excessive mechanical pressure on the speaker cone. Keep away from moisture and excessive dust. Mount securely to minimize unwanted vibration and distortion. 📦 Package Includes 1 × 45mm (1.75-Inch) 2Ω 10W Internal Magnet Full Range Speaker
2.25 Inch 4 Ohm 10 Watt Full Range Speaker with Neodymium Magnet
[Speakers] 2.25-Inch Speaker Driver • 4 Ohm Impedance • 10W Power Rating • Neodymium Magnet • Compact Full Range Audio Speaker The 2.25 Inch 4 Ohm 10 Watt Full Range Speaker with Neodymium Magnet is a compact and high-performance speaker driver designed for portable audio systems, DIY speaker projects, multimedia devices, embedded electronics, and custom sound enclosures. Featuring a powerful neodymium magnet, this speaker delivers clear vocals, balanced midrange, and improved bass response while maintaining a lightweight and compact design. With a 4 ohm impedance and 10 watt power rating, the speaker is suitable for use with small audio amplifiers, Bluetooth amplifier modules, DIY portable speakers, mini sound systems, toys, alarm systems, educational kits, and embedded electronic devices. The full-range design allows it to reproduce a wide spectrum of audio frequencies without requiring additional tweeters for many compact applications. Its durable construction and lightweight neodymium magnet assembly make it ideal for applications where both performance and space efficiency are important. ⭐ Features Compact 2.25-inch full range speaker Powerful neodymium magnet 4 ohm impedance 10 watt power rating Clear and balanced sound output Enhanced vocal clarity and midrange performance Lightweight and compact construction Easy to mount in custom enclosures Suitable for portable and embedded audio systems Ideal for DIY electronics and audio projects 📋 Technical Specifications Product Type: Full Range Speaker Driver Speaker Size: 2.25 Inch Impedance: 4 Ohm Power Rating: 10 Watt Magnet Type: Neodymium Speaker Type: Full Range Mounting Type: Enclosure / Panel Mount Application Type: Audio Output Frame Material: Metal Cone Material: Paper Composite Color: Black 🔧 Applications Suitable for: Portable Speaker Systems Bluetooth Speakers DIY Audio Projects Mini Sound Systems Multimedia Devices Toys and Educational Kits Alarm and Notification Systems Embedded Electronic Devices Mini Amplifiers Sound Modules Intercom Systems Custom Speaker Enclosures Robotics and Electronics Projects 📦 Package Includes 1 × 2.25 Inch 4 Ohm 10 Watt Full Range Speaker with Neodymium Magnet ⚠️ Precautions Do not exceed the 10W rated power. Use an amplifier compatible with 4 ohm speakers. Avoid exposure to moisture, water, and excessive dust. Mount the speaker securely to minimize unwanted vibration. Do not apply direct pressure to the speaker cone or surround.
XH-W1219 12V Digital Temperature Controller Module with Dual LED Display & Waterproof NTC Sensor
[Relay Module, Temperature Sensor] 🌡️ XH-W1219 12V Digital Temperature Controller Module with Dual LED Display & Waterproof NTC Sensor Dual LED Display • 12V DC Operation • 10A Relay Output • Heating & Cooling Modes • Waterproof NTC Sensor The XH-W1219 12V Digital Temperature Controller Module is a high-precision thermostat controller designed for automatic temperature monitoring and control in heating and cooling applications. Powered by 12V DC, this module features a dual LED display that simultaneously shows the current temperature and set temperature, making operation more convenient than the popular W1209 controller. Equipped with a waterproof NTC 10K temperature sensor, the XH-W1219 accurately measures temperatures from -50°C to +110°C. The onboard 10A relay output can directly control heaters, cooling fans, pumps, compressors, and other electrical loads within its rated capacity. The module is based on a Nuvoton microcontroller, which stores all settings in non-volatile memory, ensuring that user configurations are retained even after power loss. It supports both Heating (H) and Cooling (C) modes, adjustable hysteresis, temperature calibration, delay start, and high-temperature alarm functions. Ideal for incubators, aquariums, refrigeration systems, greenhouse automation, HVAC equipment, battery temperature monitoring, and industrial automation, the XH-W1219 provides reliable and accurate temperature control in a compact module. ⭐ Features Dual LED display for simultaneous temperature and setpoint display Operates on 12V DC High-accuracy waterproof NTC 10K temperature sensor Temperature control range from -50°C to +110°C Supports Heating and Cooling modes Built-in 10A relay output Adjustable temperature hysteresis Temperature calibration function Adjustable relay delay start High-temperature alarm function Stores settings in non-volatile memory Easy configuration using three push buttons High measurement accuracy (0.1°C resolution) Based on a Nuvoton MCU Compact PCB design with mounting holes 📋 Technical Specifications Product Type: Digital Temperature Controller Module Model: XH-W1219 Operating Voltage: 12V DC Display: Dual 3-Digit LED (Current Temperature & Set Temperature) Temperature Sensor: Waterproof NTC 10K Thermistor Temperature Control Range: -50°C to +110°C Temperature Resolution: 0.1°C Temperature Calibration: -10°C to +10°C Relay Output: 10A (Maximum) Relay Contact Rating: Up to 120VAC 10A / 14VDC 10A Control Modes: Heating (H) / Cooling (C) Hysteresis Setting: 0.1°C to 30°C Delay Start: 0–10 Minutes High Temperature Alarm: -49°C to +110°C Memory: Non-Volatile Parameter Storage Controller: Nuvoton MCU Dimensions: Approx. 60 × 44 × 17 mm Weight: Approx. 22 g (may vary slightly by manufacturer) ⚙️ Parameter Functions Parameter Description P0 Heating (H) / Cooling (C) Mode Selection P1 Temperature Hysteresis (Return Difference) P2 Maximum Temperature Limit P3 Minimum Temperature Limit P4 Temperature Calibration P5 Relay Delay Start (0–10 Minutes) P6 High Temperature Alarm Setting 🔧 Applications Suitable for: Egg Incubators Aquarium Temperature Control Greenhouse Automation Refrigeration Systems Cooling Fans Heating Elements Water Heaters HVAC Systems Fermentation Equipment Battery Temperature Monitoring Industrial Automation Laboratory Equipment DIY Electronics Smart Home Projects Arduino & Raspberry Pi Projects (Relay Interface) 📦 Package Includes 1 × XH-W1219 12V Digital Temperature Controller Module 1 × Waterproof NTC 10K Temperature Sensor ⚠️ Note Operates only on 12V DC. The relay output is rated for 10A maximum. For higher-power loads, use an external contactor or relay. Sensor cable can be extended if required using appropriate wiring. Product appearance or PCB color may vary slightly depending on the manufacturing batch.
3A 250V Black Push Button ON/OFF Lock Switch Self Locking Push Switch
[Mechanical Switches] The 3A 250V Black Push Button ON/OFF Lock Switch is a compact and reliable self-locking push-type switch designed for permanent ON/OFF control applications. Unlike momentary switches, this switch remains locked in position after pressing until pressed again. In addition, the switch uses a stable locking mechanism that allows smooth operation and reliable switching performance. As a result, it is suitable for power control, equipment activation, and automation applications. Because of its compact size and durable plastic construction, the switch is ideal for many electronic and industrial projects. Furthermore, the black button provides a clean professional appearance that matches modern control panels and electronic enclosures. The switch supports loads up to 3A at 250VAC, making it suitable for both AC and low-voltage DC control circuits. Moreover, the panel-mount structure enables quick and secure installation into control panels and electronic devices. This ON/OFF lock switch is widely used in DIY electronics, industrial automation, robotics systems, power supplies, alarm systems, and electrical control circuits. 🔹 Key Features Self-locking ON/OFF push button switch Stable locking mechanism Compact and lightweight body Professional black push button cap Easy panel mounting installation Durable plastic construction Stable and reliable switching operation Suitable for AC and DC applications 🔹 Technical Specifications Switch Type: Push Button ON/OFF Lock Switch Contact Type: Self Locking Operation Type: Push ON / Push OFF Rated Voltage: 250V AC Rated Current: 3A Button Color: Black Mounting Type: Panel Mount Mounting Hole Diameter: Approx. 12mm Button Diameter: Approx. 12mm Total Length: Approx. 28mm Body Material: Plastic Contact Material: Silver-Plated Metal Terminal Type: 2 Pin Solder/Quick Connect Operating Temperature: -25°C to +85°C 🔹 Applications This push button lock switch is suitable for many electronic and electrical applications, including: DIY electronics projects Industrial control panels Automation systems Robotics projects Power control circuits Alarm systems Electronic devices Small appliances 🔹 Package Includes 1 × 3A 250V Black Push Button ON/OFF Lock Switch
3A 250V Blue Push Button ON/OFF Lock Switch Self Locking Push Switch
[Mechanical Switches] The 3A 250V Blue Push Button ON/OFF Lock Switch is a compact and reliable self-locking push-type switch designed for permanent ON/OFF control applications. Unlike momentary switches, this switch remains locked in position after pressing until pressed again. In addition, the switch uses a stable locking mechanism that allows easy operation and reliable switching performance. As a result, it is suitable for power control, equipment activation, and automation applications. Because of its compact size and durable plastic construction, the switch is ideal for many electronic and industrial projects. Furthermore, the bright blue button improves visibility and allows quick identification during operation. The switch supports loads up to 3A at 250VAC, making it suitable for both AC and low-voltage DC control circuits. Moreover, the panel-mount structure enables quick and secure installation into control panels and electronic enclosures. This ON/OFF lock switch is widely used in DIY electronics, industrial automation, robotics systems, power supplies, alarm systems, and electrical control circuits. 🔹 Key Features Self-locking ON/OFF push button switch Stable locking mechanism Compact and lightweight body Bright blue push button cap Easy panel mounting installation Durable plastic construction Stable and reliable switching operation Suitable for AC and DC applications 🔹 Technical Specifications Switch Type: Push Button ON/OFF Lock Switch Contact Type: Self Locking Operation Type: Push ON / Push OFF Rated Voltage: 250V AC Rated Current: 3A Button Color: Blue Mounting Type: Panel Mount Mounting Hole Diameter: Approx. 12mm Button Diameter: Approx. 12mm Total Length: Approx. 28mm Body Material: Plastic Contact Material: Silver-Plated Metal Terminal Type: 2 Pin Solder/Quick Connect Operating Temperature: -25°C to +85°C 🔹 Applications This push button lock switch is suitable for many electronic and electrical applications, including: DIY electronics projects Industrial control panels Automation systems Robotics projects Power control circuits Alarm systems Electronic devices Small appliances 🔹 Package Includes 1 × 3A 250V Blue Push Button ON/OFF Lock Switch
3A 250V Yellow Push Button ON/OFF Lock Switch Self Locking Push Switch
[Mechanical Switches] The 3A 250V Yellow Push Button ON/OFF Lock Switch is a compact and reliable self-locking push-type switch designed for permanent ON/OFF control applications. Unlike momentary switches, this switch remains locked in position after pressing until pressed again. In addition, the switch uses a stable locking mechanism that allows easy operation and reliable switching performance. As a result, it is suitable for power control, equipment activation, and automation applications. Because of its compact size and durable plastic construction, the switch is ideal for many electronic and industrial projects. Furthermore, the bright yellow button improves visibility and allows quick identification during operation. The switch supports loads up to 3A at 250VAC, making it suitable for both AC and low-voltage DC control circuits. Moreover, the panel-mount structure enables quick and secure installation into control panels and electronic enclosures. This ON/OFF lock switch is widely used in DIY electronics, industrial automation, robotics systems, power supplies, alarm systems, and electrical control circuits. 🔹 Key Features Self-locking ON/OFF push button switch Stable locking mechanism Compact and lightweight body Bright yellow push button cap Easy panel mounting installation Durable plastic construction Stable and reliable switching operation Suitable for AC and DC applications 🔹 Technical Specifications Switch Type: Push Button ON/OFF Lock Switch Contact Type: Self Locking Operation Type: Push ON / Push OFF Rated Voltage: 250V AC Rated Current: 3A Button Color: Yellow Mounting Type: Panel Mount Mounting Hole Diameter: Approx. 12mm Button Diameter: Approx. 12mm Total Length: Approx. 28mm Body Material: Plastic Contact Material: Silver-Plated Metal Terminal Type: 2 Pin Solder/Quick Connect Operating Temperature: -25°C to +85°C 🔹 Applications This push button lock switch is suitable for many electronic and electrical applications, including: DIY electronics projects Industrial control panels Automation systems Robotics projects Power control circuits Alarm systems Electronic devices Small appliances 🔹 Package Includes 1 × 3A 250V Yellow Push Button ON/OFF Lock Switch
3A 250V Blue Push Button Switch Momentary Type NO Lock Push Switch
[Mechanical Switches] The 3A 250V Blue Push Button Momentary Switch is a compact and reliable push-type switch designed for temporary ON/OFF control applications. It features a momentary non-locking mechanism, which means the switch remains active only while being pressed. In addition, the switch uses a Normally Open (NO) contact configuration. As a result, the electrical circuit closes only when the button is pressed and automatically returns to its original state after release. Because of its compact size and durable plastic construction, the switch is suitable for many electronic and industrial applications. Furthermore, the bright blue button improves visibility and allows easy identification during operation. The switch supports loads up to 3A at 250VAC, making it suitable for both AC and low-voltage DC control circuits. Moreover, the panel-mount design allows quick and secure installation into control panels and electronic enclosures. This push button switch is widely used in DIY electronics, industrial automation, robotics systems, alarm systems, doorbell circuits, and power control applications. 🔹 Key Features Momentary push button operation Normally Open (NO) contact type Non-locking push switch design Compact and lightweight body Bright blue push button cap Easy panel mounting installation Stable and reliable switching operation Suitable for AC and DC applications 🔹 Technical Specifications Switch Type: Momentary Push Button Switch Contact Type: Normally Open (NO) Operation Type: Non-Locking (Push Only) Rated Voltage: 250V AC Rated Current: 3A Button Color: Blue Mounting Type: Panel Mount Mounting Hole Diameter: Approx. 12mm Button Diameter: Approx. 12mm Total Length: Approx. 28mm Body Material: Plastic Contact Material: Silver-Plated Metal Terminal Type: 2 Pin Solder/Quick Connect Operating Temperature: -25°C to +85°C 🔹 Applications This push button switch is suitable for many electronic and electrical applications, including: DIY electronics projects Industrial control panels Automation systems Robotics projects Doorbell and alarm systems Power control circuits Electronic devices 🔹 Package Includes 1 × 3A 250V Blue Push Button Momentary Switch
3A 250V Yellow Push Button Momentary Type No Lock Push Only
[Mechanical Switches] The 3A 250V Yellow Push Button Momentary Switch is a compact and reliable push-type switch designed for temporary ON/OFF control applications. It features a momentary non-locking mechanism, which means the switch remains active only while being pressed. In addition, the switch uses a Normally Open (NO) contact configuration. As a result, the electrical circuit closes only when the button is pressed and automatically returns to its original state after release. Because of its compact size and durable plastic construction, the switch is suitable for many electronic and industrial applications. Furthermore, the bright yellow button improves visibility and allows easy identification during operation. The switch supports loads up to 3A at 250VAC, making it suitable for both AC and low-voltage DC control circuits. Moreover, the panel-mount design allows quick and secure installation into control panels and electronic enclosures. This push button switch is widely used in DIY electronics, industrial automation, robotics systems, alarm systems, doorbell circuits, and power control applications. 🔹 Key Features Momentary push button operation Normally Open (NO) contact type Non-locking push switch design Compact and lightweight body Bright yellow push button cap Easy panel mounting installation Stable and reliable switching operation Suitable for AC and DC applications 🔹 Technical Specifications Switch Type: Momentary Push Button Switch Contact Type: Normally Open (NO) Operation Type: Non-Locking (Push Only) Rated Voltage: 250V AC Rated Current: 3A Button Color: Yellow Mounting Type: Panel Mount Mounting Hole Diameter: Approx. 12mm Button Diameter: Approx. 12mm Total Length: Approx. 28mm Body Material: Plastic Contact Material: Silver-Plated Metal Terminal Type: 2 Pin Solder/Quick Connect Operating Temperature: -25°C to +85°C 🔹 Applications This push button switch is suitable for many electronic and electrical applications, including: DIY electronics projects Industrial control panels Automation systems Robotics projects Doorbell and alarm systems Power control circuits Electronic devices 🔹 Package Includes 1 × 3A 250V Yellow Push Button Momentary Switch
3A 250V Green Push Button ON/OFF Lock Switch (Self-Locking)
[Mechanical Switches] 🟢 3A 250V Green Push Button ON/OFF Lock Switch (Self-Locking) Self-Locking Push Button • Push ON / Push OFF • 3A 250V Rating • Panel Mount • Green Button The 3A 250V Green Push Button ON/OFF Lock Switch is a compact and durable self-locking push button switch designed for reliable ON/OFF control in electrical and electronic applications. Unlike a momentary push button, this switch features a push ON / push OFF locking mechanism that remains in its selected position until pressed again. Designed for easy panel mounting, the switch features a 12mm mounting hole and a bright green push button for clear identification in control panels and electronic enclosures. Its rugged plastic housing and silver-plated contacts ensure excellent electrical conductivity, stable switching, and long service life. With a rating of 3A at 250V AC, this switch is ideal for industrial equipment, automation systems, robotics, power control circuits, DIY electronics, alarm systems, and various electronic devices. ⭐ Features Self-locking push button switch Push ON / Push OFF operation Bright green push button Rated for 3A at 250V AC Compact and lightweight design Easy panel mount installation Durable plastic housing Silver-plated contacts for reliable conductivity Stable and reliable switching performance Suitable for AC and low-voltage DC applications Long mechanical life Ideal for industrial and DIY applications 📋 Technical Specifications Product Type: Push Button ON/OFF Lock Switch Switch Type: Self-Locking (Latching) Operation: Push ON / Push OFF Rated Voltage: 250V AC Rated Current: 3A Button Color: Green Mounting Type: Panel Mount Mounting Hole Diameter: Approx. 12mm Button Diameter: Approx. 12mm Overall Length: Approx. 28mm Terminal Type: 2-Pin Solder / Quick Connect Contact Material: Silver-Plated Metal Body Material: Durable Plastic Operating Temperature: -25°C to +85°C 🔧 Applications Suitable for: Industrial Control Panels Automation Systems Robotics Projects DIY Electronics Power Control Circuits Alarm Systems Electronic Equipment Small Home Appliances Instrumentation Panels Test Equipment Educational Projects Control Boxes 📦 Package Includes 1 × 3A 250V Green Push Button ON/OFF Self-Locking Switch ⚠️ Note This is a self-locking (maintained) push button switch, not a momentary switch. Press once to switch ON and press again to switch OFF. Ensure the switch rating is suitable for your application before installation. Disconnect power before wiring the switch.
315MHz 4 Channel Wireless RF Remote Control Kit with Receiver Module (Non-Locking Mode)
[RF Module] 📡 315MHz 4 Channel Wireless RF Remote Control Kit with Receiver Module (Non-Locking Mode) 4 Channel RF Remote • 315MHz ASK Communication • 5V Receiver • Non-Locking Mode • Long Range Wireless Control The 315MHz 4 Channel Wireless RF Remote Control Kit is a reliable wireless control solution consisting of a 4-button RF transmitter and a super regenerative ASK receiver module. Operating at 315MHz, this kit is ideal for remote switching, automation, robotics, security systems, and DIY wireless control projects. The receiver module features four independent digital outputs (D0–D3) that correspond to the four buttons on the transmitter. When a button is pressed, the respective output pin goes HIGH, returning LOW immediately after the button is released. This Non-Locking (Momentary/Jog) operation makes the module perfect for applications requiring temporary switching such as electric door control, motor jogging, relay activation, and microcontroller interfacing. The receiver operates from a 5V DC supply and features a high-sensitivity ASK receiver with a Valid Transmission (VT) output pin for reliable signal detection. The transmitter uses a fixed-code encoder for secure communication and easy operation. Ideal for Arduino, ESP32, Raspberry Pi, AVR, PIC, industrial automation, wireless switching, and educational electronics projects. ⭐ Features 4-channel wireless RF remote control kit Operating frequency: 315MHz ASK (Amplitude Shift Keying) modulation Fixed-code RF transmitter Non-Locking (Momentary/Jog) operating mode Four independent digital outputs (D0–D3) High-sensitivity super regenerative receiver 5V DC receiver operating voltage VT (Valid Transmission) status output Compact PCB design Easy interface with microcontrollers Long wireless transmission range (environment dependent) Suitable for DIY and industrial automation 📋 Technical Specifications RF Transmitter Product Type: RF Wireless Remote Control Operating Frequency: 315MHz Number of Buttons: 4 Channels: 4 Modulation: ASK (Amplitude Shift Keying) Encoding Type: Fixed Code Operating Mode: Non-Locking (Momentary) Power Supply: 12V A23 Battery (Not Included) RF Receiver Module Operating Voltage: 5V DC Operating Frequency: 315MHz Receiver Type: Super Regenerative ASK Receiver Receiver Sensitivity: -98dBm Output Channels: D0, D1, D2, D3 VT Output: Yes (Valid Signal Output) Antenna Connection: External ANT Pin Recommended Antenna Length: Approx. 17cm (Quarter-Wave) Module Dimensions: Approx. 41 × 22 × 7 mm Receiver Pin Configuration VT – Valid Signal Output D3 – Channel 4 Output D2 – Channel 3 Output D1 – Channel 2 Output D0 – Channel 1 Output +5V – Power Input GND – Ground ANT – External Antenna Connection 🔧 Operating Modes Non-Locking (Momentary/Jog Mode) Press a button → Corresponding output goes HIGH. Release the button → Output immediately returns LOW. Ideal for momentary control applications. Note: This product is supplied in Non-Locking Mode only. 🔧 Applications Suitable for: Arduino Projects ESP32 Projects Raspberry Pi Projects Wireless Relay Control Home Automation Industrial Automation Remote Door Control Electric Door Locks Wireless Switching Robotics Motor Control Lighting Control Alarm Systems Security Systems DIY Electronics Educational Projects 📦 Package Includes 1 × 4-Button 315MHz RF Wireless Remote Control 1 × 315MHz Super Regenerative Receiver Module ⚠️ Note Battery is included. A 12V A23 battery is required for operation. Avoid bending or touching the receiver's onboard inductor (copper coil), as this may affect receiver sensitivity. Wireless operating range depends on antenna quality, obstacles, and surrounding RF interference. Product appearance may vary slightly depending on the manufacturing batch.
Out of stockMC-38 Wired Door Window Sensor Magnetic Switch Home Alarm System
[Magnetic Sensor] If you want to Apply Extra Security for your house then this Magnetic Switch is needed for you. This magnetic switch is used for triggering an alarm or ON/OFF light inside a cupboard sliding door In-home alarm systems you need many sensors like proximity sensors, Heat detection sensors, and Magnetic door sensors to determine the safety status of the home. In these sensors door sensors are important as these determine whether the gate is open or closed. This is an MC-38 Door Window Sensor Magnetic Switch Home Alarm System Normally Closed type which you can install on your door and use it with your home alarm system. It is very easy to install and conceal and can be easily used in places like your home, office, and hotels. Connection Diagram of MC-38 With Arduino: Features : Easy to install Strong concealment The magnetic sensor alarm, controls the switch of the circuit via the built-in magnet Alarm when someone intrudes into your places Can be used in places like apartments, hotels, offices, etc. Ideal for residential or commercial use. Designed to do embedded in the door or window frame. Package Includes : 1 x MC-38 Wired Door Window Sensor Magnetic Switch Home Alarm System. 4 x M5 screws for fitting.
Out of stock2 inch 15 Watt 3-4 Ohm Speaker 53mm Diameter good Quality
[Speakers] Description This is a general-purpose 3-4 Ohm 15 Watt Speaker that can be used for a variety of audio projects. It has a balanced frequency response and is extremely efficient. Excellent high-frequency response. It is a type of transducer that converts electromagnetic energy into sound waves. It converts analog signal inputs from computers or audio players into sound waves. Because of its small size, it can be used in a variety of applications where space is limited. It can be used in Doorbells, Bluetooth speakers, music systems, Alarms and various other projects. Specifications Impedance 3-4 ohms Power 15 Watt Speaker Dimension 53mm*53mm Thickness 29.4mm Magnet Diameter 44.0mm Shape Top Round, Square Frame Material Metal, Magnet & Plastic Color Black & Silver Magnet Type External Quantity 1 Pieces Country of Origin China
Out of stock12-84V or 7-120V Battery Power Display Meter Lithium Battery Power Display GY-6GS Green Battery Indicator Pro
[Battery Capacity Tester] Introducing 12-84V or 7-120V Battery Power Display Meter design to accurately monitor battery capacity. This 12-84V or 7-120V Lithium Battery Capacity Meter GY-6GS Green Display is ideal for a range of applications to ensure precise voltage and capacity reading. It is also compatible with lithium and iron lithium battery. This meter also provide real time data with a bright, clear LCD screen. This Lithium Battery Capacity Meter feature a use friendly double button design for quick setup. It allows users to manually switch between battery percentage, voltage, and power off functions. The automatic cycling display and settable auto off function enhance convenience and efficiency. With the 12-84V or 7-120V GY-6GS battery capacity meter, you get an intuitive and reliable tool. The waterproof surface and long-lasting buttons add to its durability. Its alarm function alerts you when the power drops below 20%, ensuring optimal battery management. Features Wide Voltage Compatibility: This Battery capacity meter display support a wide voltage range from 12-84V or 7-120V . It accurately measures and display both lithium and lead acid battery level. Clear and Intuitive Display: The high quality LCD with green backlit ensure visibility from every angle. It clearly shows battery percentage, voltage, and status in various lighting condition. User Friendly Design: It is also equipped with a comfortable, long lasting button and waterproof PVC film. The built in buckle allow for easy screw free installation on various device. Safety and Convenience Feature: The backlight flashes an alarm when power drops to 20% or below. It include a switch to turn off power & prevent from consumption when not in use. Customizable Settings: Easily set preferences with the double button design in just seconds. The meter features automatic and manual display cycles, auto off delay, and dual discharge curve option. Specification Voltage Range: 7-120V Battery Type Compatibility: Lithium Battery, Display Type: LCD Display Color Background: Green Measurement Accuracy: ±1% Operating Temperature: -10°C to 65°C Power Consumption: <20mA Dimensions: 61mm x 33mm x 13mm Setting Instruction of 12-84V or 7-120V Battery Power Display Meter Lithium Battery Power Display GY-6GS Green Battery: Long press the Set key, power supply to the product, enter the setup interface Press the Set key to select the battery specification ( Lithium battery (L), Fe battery(F), Lead Acid(P)) Short press the Function key to select the number of battery strings (increasing for the set button, decreasing for function button) Long press the Function key to set s mode. 12-84V or 7-120V any model can dispatch depends on stock. Package Contains : 1 x 7-120V Battery Power Display Meter Lithium Battery Power Display GY-6GS Green Lithium Battery
DS3231 RTC Memory Module Precise Real Time Clock I2C-AT24C32
[Clock Module] The DS3231 RTC Real Time Clock Module is a precision timing module designed to provide accurate date and time information even when the main system power is unavailable. It features the highly accurate DS3231 RTC IC along with an onboard AT24C32 EEPROM memory chip for storing user data. In addition, the module includes a built-in temperature-compensated crystal oscillator (TCXO), which significantly improves timekeeping accuracy compared to conventional RTC modules. As a result, it offers excellent long-term stability with minimal drift. Because of its battery backup capability, the RTC continues to maintain accurate time and calendar information during power outages. Furthermore, the module automatically manages switching between the main power source and backup battery. The onboard AT24C32 EEPROM provides non-volatile storage for user settings, calibration values, and project data. Moreover, the module communicates through the standard I2C interface, making integration simple with Arduino, Raspberry Pi, ESP32, STM32, NodeMCU, and other microcontroller platforms. The DS3231 keeps track of seconds, minutes, hours, day, date, month, and year while automatically compensating for leap years up to the year 2100. ⚠️ Note: CR2032 backup battery is not included. 🔹 Key Features High-accuracy DS3231 RTC IC Built-in temperature-compensated crystal oscillator (TCXO) Integrated AT24C32 EEPROM memory Battery backup support Automatic leap-year compensation Two programmable alarms Programmable square-wave output Digital temperature sensor output I2C communication interface Low power consumption Excellent long-term timekeeping stability Compatible with Arduino, ESP32, Raspberry Pi, and STM32 🔹 Technical Specifications RTC IC: DS3231 EEPROM IC: AT24C32 Communication Protocol: I2C Operating Voltage: 3.3V – 5V DC Time Format: 12-Hour / 24-Hour Calendar Support: Day, Date, Month, Year Leap Year Compensation: Valid Up To 2100 Alarm Functions: 2 Programmable Alarms Square Wave Output: Programmable Temperature Sensor Accuracy: ±3°C Backup Battery: CR2032 (Not Included) Data Storage: 32Kb EEPROM (AT24C32) Low Power Operation: Yes 🔹 Pin Configuration VCC – Power Supply (3.3V – 5V) GND – Ground SDA – I2C Data Line SCL – I2C Clock Line Arduino UNO Connection SDA → A4 SCL → A5 VCC → 5V GND → GND 🔹 Applications This RTC module is suitable for: Arduino projects Raspberry Pi projects ESP32 projects Data loggers Digital clocks IoT systems Automation systems Time-stamped monitoring systems Industrial controllers Embedded electronics projects 🔹 Package Includes 1 × DS3231 RTC Real Time Clock Module with AT24C32 EEPROM
Flame Sensor infrared Receiver Ignition source detection module
[Flame Sensor, Sensors] This tiny Flame sensor infrared receiver module ignition source detection module is Arduino compatible can use to detect flame or wavelength of the light source within 760nm~1100nm also useful for Lighter flame detect at the distance 80cm. Greater the flame, farther the test distance. It has the Detect angle of 60° and very sensitive to flame spectrum. It produces the one channel output signal at the D0 terminal for further processing like an alarm system or any switching system. The sensitivity is adjustable with the help of blue potentiometer given on the board. Features : Indicator light: a green one for the switch, a red one for power. Built in a potentiometer for sensitivity control. Onboard signal output indication, output effective signal is high, at the same time the indicator light up, the output signal can directly connect to microcontroller IO. Can detect fire or wavelength in 760 ~ 1100 nm nano within the scope of the light source. Detection angle about 60 degrees, the flame spectrum especially sensitive. The flame of the most sensitive sensors flame, the regular light is also a response, generally used for fire alarm purposes. Package Includes : 1 x Flame sensor infrared receiver module ignition source detection module
Vibration sensor module alarm Motion sensor module vibration switch SW-420
[Vibration Sensor] Vibration sensor module alarm Motion sensor module vibration switch SW-420 module based on the vibration sensor SW-420 and Comparator LM393 to detect if there is any vibration that beyond the threshold. The threshold can adjust using an onboard potentiometer. When this no vibration, this module output logic LOW the signal indicates LED light, and vice versa. If the module does not vibrate, the vibration switch was on the close state, the output of low output, the green indicator light. The product vibrates, vibration switches momentary disconnect, the output is driven high, the green light does not shine. The output can connect to the microcontroller, which to detect high and low level; so as to detect whether the environment exists vibration, play a role in the alarm. Note: Do not reverse the power directions, otherwise, it is possible to burn the chip. Signal LED light is output Low, signal LED OFF output is High. The output level close to the input voltage. Features : Using SW-420 normally closed type vibration sensor. Comparator output, clean signal, good waveform, strong driving ability, >15mA. Using a wide voltage LM393 comparator. With bolt holes for easy installation. Package Includes : 1 x Vibration sensor module alarm Motion sensor module vibration switch SW-420.
1.5-Inch 40mm Speaker – 4Ω 2W with Neodymium Magnet
[Speakers] 1.5-Inch 40mm Speaker – 4Ω 2W with Neodymium Magnet The 1.5-Inch 40mm Speaker with Neodymium Magnet is a compact and lightweight audio driver designed for DIY electronics, portable speakers, multimedia devices, toys, alarms, embedded systems, and other space-constrained audio applications. Featuring a neodymium magnet, this speaker provides a compact magnetic structure while maintaining efficient audio performance. With a 40mm (1.5-inch) speaker size, 4Ω impedance, and 2W power rating, it is suitable for small audio amplifier projects and compact electronic devices. Its lightweight construction makes it particularly suitable for portable applications where space and weight are important considerations. ⭐ Key Features 40mm (1.5-Inch) speaker size 4Ω impedance 2W power rating Neodymium magnet Compact and lightweight design Clear and balanced sound output Suitable for low-power audio applications Easy to integrate into compact enclosures Ideal for DIY and embedded electronics Suitable for portable audio devices 📋 Technical Specifications Product Type: Mini Full Range Speaker Speaker Size: 40mm (1.5 Inch) Diameter: 40mm Impedance: 4Ω Power Rating: 2W Magnet Type: Neodymium Speaker Type: Dynamic / Full Range Mounting: Enclosure / Panel Mount Application: Compact Audio & Embedded Electronics 🔧 Applications DIY Speaker Projects Mini Bluetooth Speakers Portable Audio Devices Multimedia Devices Toys and Educational Kits Alarm and Notification Systems Intercom Systems Embedded Electronics Smart Gadgets Replacement Speaker Applications Mini Amplifier Projects OEM Electronic Products 🛠️ Installation Connect the speaker to a compatible audio amplifier designed for a 4Ω load. Ensure that the amplifier's output power is suitable for the speaker's 2W rating. Mount the speaker securely inside the enclosure to reduce unwanted vibration and improve sound performance. 📦 Package Includes 1 × 40mm (1.5-Inch) 4Ω 2W Speaker with Neodymium Magnet ⚠️ Precautions Match the 4Ω impedance with the amplifier output. Do not exceed the 2W rated power. Do not apply direct DC voltage to the speaker. Ensure correct polarity during installation. Avoid moisture and excessive dust. Do not apply pressure to the speaker cone or diaphragm. Mount securely to prevent vibration and unwanted noise. Use a compatible amplifier for best performance.
SPST Momentary Rectangular Horn Type Push Button Switch – Red
[Mechanical Switches] SPST Momentary Rectangular Horn Type Push Button Switch – Red The SPST Momentary Rectangular Horn Type Push Button Switch (Red) is a durable and reliable momentary push-to-ON switch designed for horn, alarm, buzzer, control, and general-purpose switching applications. The switch completes the electrical circuit only while the button is pressed and automatically returns to the OFF state when released. Its rectangular horn-type button provides a convenient pressing surface, while the red actuator offers high visibility for applications where quick identification of the control is important. The panel-mount design allows easy installation in control panels, vehicles, enclosures, and DIY projects. ⭐ Key Features SPST (Single Pole Single Throw) Momentary push-to-ON operation Spring-return action Rectangular horn-type button Red button Panel-mount design Durable construction Reliable contact performance Easy to operate Suitable for horn and alarm applications 📋 Technical Specifications Product Type: Momentary Push Button Switch Switch Type: SPST Operation: Momentary / Spring Return Contact Action: Push-to-ON Button Shape: Rectangular Horn Type Button Color: Red Mounting Type: Panel Mount Number of Poles: Single Pole Number of Throws: Single Throw Application: Horn / Alarm / Control Contact Type: Momentary Note: The supplied product information does not specify the voltage rating, current rating, dimensions, terminal type, or mechanical/electrical life, so these specifications should be verified against the exact product variant before listing them. 🔧 Applications Vehicle Horn Switch Car Horn Bike Horn Marine Horn Alarm & Buzzer Control Industrial Control Panels Start / Stop / Reset Functions DIY Electronics Projects Consumer Electronics Testing Equipment Temporary Circuit Activation 🛠️ Installation Install the switch through a suitable panel cutout and secure it firmly. Connect the switch terminals according to the required circuit. Since this is a momentary push-to-ON switch, the circuit is active while the button is pressed and returns to its normal OFF state when released. 📦 Package Includes 1 × SPST Momentary Rectangular Horn Type Push Button Switch – Red ⚠️ Precautions Verify the switch's voltage and current rating before connecting a load. Disconnect the power supply before installation or wiring. Ensure terminals and wiring are properly secured. Do not exceed the manufacturer's electrical ratings. For vehicle or industrial applications, use an appropriate relay where the load current exceeds the switch rating. Product images are for illustration purposes only and actual appearance may vary.
433Mhz RF Transmitter With Receiver Kit For Arduino ARM MCU Wireless
[RF Module] This is a 433Mhz RF transmitter with a receiver kit for Arduino ARM MCU wireless. It can be used as a Remote control switch, electric doors, shutter doors, windows, remote control socket, remote control LED, remote control stereo, and alarm systems. Specifications for Receiver module: Operating voltage: DC5V Quiescent Current: 4mA Receiving frequency: 433.92MHZ Receiver sensitivity: -105DB Specifications for transmitter module: Launch distance:20-200 meters (different voltage, different results) Transfer rate: 4KB / S Operating mode: AM Transmitting power: 10mW Transmitting frequency: 433M Pinout from left-right: (DATA; VCC; GND) Operating voltage :3.5-12V Applications: Remote Controls Automation System Wireless Security System Sensor Reporting Car Security System Remote Keyless Entry Package Includes: 1 x Receiver module 1 x Transmitter
Out of stockLipo Voltage Checker 1S-8S with Buzzer Alarm
[Li-Ion Capacity Indicator] The LiPo Battery Voltage Checker 1S-8S with Buzzer is a quality product available and a special design to measure and display the voltage of LiPo battery packs. This voltage checker can measure the voltage of the battery pack as well as the voltage of every single cell of the battery pack. This unit also features a handy built-in LED display that will show the voltage of each cell followed by the overall voltage of the pack. Don’t risk your model by flying on depleted batteries, at this price piece of mind flying can’t be any cheaper! Simply connect the battery balance plug to the leads of this voltage checker, it will show the instant voltage of each cell one by one ending with displaying the voltage of the total pack. The Li-PO Voltage Checker 1S-8S with Buzzer Alarm is equipped with loud twin piezo alarms which will notify you once your cells reach a low voltage or user defined voltage. You can customize the alarm to sound at a voltage between 2.7v-3.8v per cell in 0.10v increments. It has a mode button at the top for setting the desired voltage value. Features : Input: 1S-8S Battery Battery type: Lipo/LiFe/Li-ion/LiMn It has a Buzzer Alarm for low voltage indication. Useful for measuring each cell voltage. It has a mode button at the top for setting the desired voltage value. Package Includes : 1 x LiPo Battery Voltage Checker 1S-8S with Buzzer