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Electronics, sensors, robotics kits, PC components, peripherals — everything Unik Systems carries, in one place.
Only 1 leftDrone Kit
Frame: 180–250mm class. Motors: brushless 2204/2205/2300KV. ESC: 20A–30A. Flight controller: F4/F7 (or basic for edu kits). Battery: LiPo 3S/4S. Props: 5-inch typical. Radio: 2.4GHz. Prop guards recommended.
Razer DeathAdder V3
Lightweight 59 g esports mouse. Focus Pro 30K sensor, 90 hour battery (V3 Pro Wireless variant available).
Logitech MX Master 4 Wireless Ergonomic Mouse (Graphite)
[Mouse] Logitech MX Master 4 Wireless Ergonomic Productivity Mouse - Graphite The gold standard in productivity. Features Quiet Clicks, 8,000 DPI Darkfield sensor that tracks anywhere (even on glass), MagSpeed electromagnetic scrolling up to 1,000 lines per second, and multi-device Logi Bolt + Bluetooth connectivity. ⭐ Key Features - MagSpeed Electromagnetic Scrolling: Ultra-fast, ultra-quiet, pixel-precise - 8,000 DPI Darkfield High Precision sensor tracks on any surface including glass - Quiet Click buttons reduce click noise by 90% - Cross-computer Flow control between up to 3 PCs or Macs - USB-C Quick Charging: Up to 70 days battery life on full charge; 3 hours from 1 minute charge 📋 Technical Specifications - Sensor: Darkfield high precision (200 - 8000 DPI) - Buttons: 7 buttons (Left/Right, Back/Forward, App-Switch, Wheel mode-shift, Middle click) - Wireless: Bluetooth Low Energy + Logi Bolt USB Receiver (10m range) - Battery: Rechargeable Li-Po (500 mAh) - Weight: 141 grams 📦 Package Includes - 1 x Logitech MX Master 4 Mouse (Graphite) - 1 x Logi Bolt USB Receiver - 1 x USB-C Charging Cable
Paper Circuit Kit
Conductive copper foil tape. Power: 3V coin cell (CR2032). Components: LEDs (3mm/5mm), push switch, battery holder. Use: series/parallel circuits on paper. Safe low-voltage.
Only 2 leftOtto
Biped robot kit. Servos: 4 micro servos (legs/feet). MCU: Arduino Nano compatible. Sensors: ultrasonic + buzzer. Power: 5V (battery pack). Programming: Arduino IDE / block coding. Functions: walk/dance/avoid.
Only 1 leftPlay Tronix
Airframe: foam/balsa/corrugated. Components: propeller, DC motor/brushless, servo(s), control horns, pushrods. Electronics: ESC (if brushless), battery. Concepts: lift/drag/thrust, CG/balance.
Razer Viper V3 Hyperspeed
Symmetrical wireless mouse, 82 g, Focus Pro 30K, 280-hour battery (single AA).
SteelSeries Arctis Nova 7
Premium wireless headset. Simultaneous 2.4 GHz + Bluetooth, ClearCast Gen 2 mic, 38-hour battery.
Only 2 leftLogitech G PRO X 2 LIGHTSPEED
Wireless tournament-grade headset. Graphene drivers, Blue Voice mic processing, 50-hour battery.
Apple MacBook Air M2 (8 GB / 256 GB)
Apple M2 silicon, 13.6" Liquid Retina, 8 GB unified memory, 256 GB SSD. Fanless, all-day battery.
Out of stockLogitech G304 LIGHTSPEED Wireless
Wireless gaming mouse, HERO sensor, 250-hour battery on one AA.
Out of stockHyperX Cloud Alpha Wireless
300-hour battery wireless gaming headset. 50mm dual-chamber drivers.
Out of stockLogitech G PRO X 2 LIGHTSPEED Wireless
50mm graphene drivers, dual-mic, 50-hour battery wireless gaming headset.
Out of stockRazer BlackShark V2 Pro Wireless
70-hour battery wireless esports headset, TriForce Titanium 50mm drivers.
Out of stockLogitech G Cloud Gaming Handheld
Android handheld for cloud gaming. 7" 1080p IPS, 12-hour battery.
Out of stockXbox Elite Wireless Controller Series 2
Adjustable trigger tension, swappable paddles, 40-hour battery.
Out of stock0.96 Inch Blue SPI OLED Display Module 7-Pin 128×64 – SSD1306
[LED/LCD Display] 0.96 Inch Blue SPI OLED Display Module 7-Pin 128×64 – SSD1306 The 0.96-inch Blue OLED Display Module is a compact graphical display based on the SSD1306 driver IC, featuring a 128×64 pixel resolution and blue monochrome display. This version has a 7-pin interface with a dedicated CS (Chip Select) pin, making it suitable for 4-wire SPI communication. The module is factory-configured for SPI and can also be modified for I2C/IIC communication on compatible board versions. With its compact size, wide viewing angle and low-power OLED technology, it is suitable for Arduino, ESP32, ESP8266, STM32, Raspberry Pi and other microcontroller projects. ⭐ Key Features 0.96-inch blue OLED display 128 × 64 pixel resolution SSD1306 driver IC 7-pin interface Dedicated CS (Chip Select) pin Factory configured for 4-wire SPI Supports SPI and I2C/IIC with appropriate configuration 3.3V/5V compatible on supported module versions No backlight required Low power consumption Wide viewing angle of more than 160° Compact PCB design Pre-soldered 7-pin male header Compatible with Arduino, ESP32, ESP8266, STM32 and Raspberry Pi projects 📋 Technical Specifications Display Type: OLED (Organic Light-Emitting Diode) Display Colour: Blue Display Size: 0.96 inch Driver IC: SSD1306 Resolution: 128 × 64 pixels Interface: SPI / I2C Default Interface: 4-wire SPI Input Voltage: 3.3V–5V Viewing Angle: >160° Module Dimensions: Approximately 27 × 27 × 4mm Operating Temperature: Approximately -30°C to +70°C Header: 7-pin male header, pre-soldered Display Type: Monochrome blue OLED 🔌 7-Pin Interface The 7-pin version provides the following connections: GND – Ground VCC – Power supply D0 / SCK / CLK – SPI clock D1 / MOSI / SDA – SPI data RES / RST – Display reset DC / A0 – Data/Command selection CS – Chip Select 🛠️ SPI Connection The module is normally supplied in 4-wire SPI configuration. For an Arduino Uno, a typical connection is: VCC → 5V GND → GND D0 → SCK / D13 D1 → MOSI / D11 RES → Digital I/O DC → Digital I/O CS → Digital I/O The dedicated CS pin allows the OLED to share the SPI bus with other devices such as SD cards or additional SPI peripherals. 🔄 I2C / IIC Configuration On compatible versions, the module can be converted from SPI to I2C by changing the appropriate resistor configuration on the PCB. The supplied board configuration may require: Moving the resistor from R3 to R1 Shorting R8 with solder Using D0 as SCL Using D1 as SDA Configuring DC for the I2C address The exact resistor positions can vary between board revisions, so check the markings on your particular PCB before modification. 🎯 Applications Arduino projects ESP32 projects ESP8266 projects STM32 development Raspberry Pi projects IoT devices Sensor displays Voltage/current meters Battery monitors Temperature displays Digital clocks Data loggers Portable electronic devices Robotics DIY measuring instruments Embedded systems Menu and status displays 💡 Advantages of OLED OLED technology is self-emissive, meaning the pixels produce their own light and do not require a conventional backlight. This provides high contrast, compact construction and a wide viewing angle while keeping power consumption relatively low. ⚠️ Important Notes This is the 7-pin SPI version, not the 6-pin version. The module is normally configured for SPI communication. Check the PCB labels before connecting the module. Do not exceed the specified supply voltage. Although many versions support 5V operation, the exact voltage tolerance can vary between board revisions. I2C operation may require hardware resistor modification. The actual PCB layout and component markings may vary slightly between production batches. Display colour: Blue. Libraries such as Adafruit SSD1306 and U8g2 can be used with compatible microcontrollers. 📦 Package Includes 1 × 0.96 Inch Blue SPI OLED Display Module
26650 Battery Holder / Battery Spacer 2×1 – 26.3mm Bore Diameter
[Lithium Battery Holder] 26650 Battery Holder / Battery Spacer 2×1 – 26.3mm Bore Diameter The 26650 Battery Holder / Battery Spacer 2×1 is a cylindrical battery spacer designed to securely arrange 26650 lithium-ion battery cells while building multi-cell battery packs. Made from flame-retardant ABS+PC material, it provides a strong and stable structure while allowing air circulation around the cells. The holder features interlocking slots on the edges, allowing multiple spacers to be joined together to create different battery-pack sizes and configurations. After welding nickel strips, the assembled battery pack can achieve a solid and reliable structure without requiring additional connecting hardware. ⭐ Key Features Designed for 26650 cylindrical lithium-ion cells 2 × 1 configuration 26.3mm bore diameter Made from flame-retardant ABS+PC material High-temperature resistant construction Crack-resistant design Interlocking slots for connecting multiple spacers Allows flexible battery-pack configurations Provides mechanical support for battery cells Helps maintain proper spacing between cells Suitable for high-current battery-pack construction Helps improve battery-pack stability and reliability Allows airflow around the cells for heat dissipation 📋 Technical Specifications Product Type: Battery Holder / Battery Spacer Compatible Cell: 26650 cylindrical battery Configuration: 2 × 1 Number of Cells: 2 Bore Diameter: 26.3mm Material: Flame-retardant ABS+PC Construction: Interlocking modular design Mounting: Multiple spacers can be joined together Application: Lithium battery pack assembly Cell Type: Cylindrical Li-ion cells 🔧 Applications 26650 lithium-ion battery packs E-bike battery packs Electric scooter battery packs Electric vehicle battery packs Power-tool battery packs DIY high-current battery packs UPS battery systems Solar energy storage packs Portable power stations Robotics battery packs Custom lithium battery assemblies 🛠️ How to Use The spacer is designed to hold two 26650 cells in a 2×1 arrangement. Multiple spacers can be connected through the slots provided around the edges to create larger battery-pack configurations. For a complete battery pack: Cell → Spacer → Nickel Strip Welding → Additional Spacers → Battery Pack For mechanical support, spacers can be positioned at the top and bottom of the cells. Important: For each individual battery cell, 2 spacers are recommended—one at the top and one at the bottom. 💡 Advantages Simple Assembly: Easy to arrange cylindrical cells. Flexible Design: Multiple spacers can be interconnected to create different pack shapes. Strong Construction: Helps keep cells firmly positioned. Heat Dissipation: Provides spacing between cells and allows airflow. Reliable Battery Pack: Helps make the completed pack mechanically stable. Suitable for Complex Packs: Useful for custom battery configurations, including e-bike and high-current applications. ⚠️ Important Notes This product is only a battery holder/spacer; batteries are not included. The 26.3mm bore is intended for compatible 26650 cells. Check your actual cell diameter before purchase. Do not force oversized cells into the holder. Battery cells should be properly insulated and securely assembled. Use suitable nickel strip and an appropriate spot-welding method. Use a suitable BMS/protection system for the completed lithium battery pack. Battery cells should be properly matched before assembling a multi-cell pack. 2 spacers are recommended per individual cell, one on each end. Keep the battery assembly away from excessive heat, moisture and physical damage. 📦 Package Includes 1 × 26650 Battery Holder / Battery Spacer – 2×1, 26.3mm Bore Diameter Note: Battery cells, nickel strips and BMS are not included.
2S 4A Type-C Lithium Battery Charging Module – 8.4V Step-Up Boost Charger for 18650 Lipo
[Step UP Buck Converter] 2S 4A Type-C Lithium Battery Charging Module – 8.4V Step-Up Boost Charger for 18650 The 2S 4A Type-C Lithium Battery Charging Module is a compact step-up charging board designed for charging 2-cell series (2S) 18650 Li-ion/Li-Po battery packs. It accepts a 3–6V DC input through USB Type-C and boosts the voltage to 8.4V, the required full-charge voltage for a 2S lithium battery pack. The 4A specification refers to the maximum input current version. According to available product specifications, the corresponding charging current is approximately 2.2A, rather than 4A. ⭐ Key Features Designed for 2S lithium-ion/Li-Po battery packs Suitable for 2 × 18650 cells connected in series USB Type-C input 3–6V DC input Recommended input: 3.7V / 5V Step-up/boost charging circuit 8.4V charging voltage 4A maximum input-current version Approximately 2.2A charging current Automatic recharge function Battery charging protection features Compact PCB design LED charging/status indication Suitable for DIY battery and portable-power projects 📋 Technical Specifications Product Type: 2S Lithium Battery Step-Up Charging Module Battery Configuration: 2S – 2 cells in series Compatible Battery: 3.6V/3.7V Li-ion / Li-Po Nominal Battery Pack Voltage: 7.4V Full-Charge Voltage: 8.4V Input Voltage: DC 3–6V Recommended Input: DC 3.7V / 5V Maximum Input Current: 4A Charging Current: Approximately 2.2A Charging Interface: USB Type-C Charging Mode: Constant-current / constant-voltage Board Size: Approximately 39 × 18 × 6.3mm Operating Temperature: -40°C to +85°C LED Indicators: Charging / fully charged or constant-voltage status 🔋 Charging Performance For the 2S 4A version: USB Type-C 5V → Boost Charging Module → 8.4V → 2S Battery Pack The module draws up to approximately 4A from the input, while the specified charging current is approximately 2.2A. This distinction is important when selecting the USB power adapter. 🔧 Applications 2S 18650 battery packs 7.4V Li-ion battery packs 2S Li-Po battery packs DIY power banks Portable electronics Bluetooth speaker battery systems Robotics projects Solar charging applications Electronic prototyping Portable audio equipment Electric fan projects Type-C rechargeable equipment Custom battery charging systems 🛠️ How It Works The module uses a boost/step-up charging circuit to convert the lower USB Type-C input voltage into the 8.4V charging voltage required for a 2S lithium battery pack. Example: 5V Type-C Input → Step-Up Circuit → 8.4V Charging Output → 2S 18650 Battery A 2S battery pack consists of two lithium cells connected in series: 3.7V + 3.7V = 7.4V nominal4.2V + 4.2V = 8.4V fully charged 💡 LED Indicators The module uses status indicators to show the charging condition: CR: Charging OK: Fully charged / constant-voltage stage ⚠️ Important Notes This module is intended for 2S battery packs only. Do not connect a single 18650 cell directly to the 8.4V charging output. The two cells should be properly matched and in good condition. Do not exceed the 6V maximum input voltage. A suitable Type-C power source is required to supply the necessary input current. The 4A rating is the input-current rating, not the battery charging current. The specified charging current for this 2S 4A version is approximately 2.2A. This charging module should not automatically be considered a replacement for a dedicated 2S BMS/protection board. Use appropriate battery protection where required. Check the PCB polarity and connection markings before connecting the battery. Do not short-circuit the input or output. Use properly matched lithium cells for safe and reliable charging. Keep the module adequately ventilated during higher-current operation. 📦 Package Includes 1 × 2S 4A Type-C Step-Up Boost Lithium Battery Charging Module – 8.4V
KWS-MX18 10-in-1 USB Tester Digital LCD Voltage, Current & Power Meter
[Ammeter and Voltmeter] KWS-MX18 10-in-1 USB Tester – Digital LCD Voltage, Current & Power Meter The KWS-MX18 10-in-1 USB Tester is a compact multifunction digital testing instrument designed for monitoring and evaluating USB chargers, power banks, USB ports, mobile charging systems, and other DC power sources. It provides real-time measurement of voltage, current, power, capacity, energy, charging time, resistance, and internal temperature on its digital display. The tester supports a DC voltage range of 4–30V and current measurement up to approximately 5.1A, with power measurement up to 150W. It also provides capacity and energy monitoring, making it useful for checking the actual charging performance and capacity of USB power supplies and power banks. ⭐ Key Features 10-in-1 multifunction USB tester Digital LCD display Real-time voltage and current monitoring Measures power consumption Measures accumulated charging capacity Measures energy consumption Charging time measurement Charging resistance measurement Internal temperature measurement Positive and negative voltage measurement Stores measurement data in 9 groups Power-off memory function Compact and lightweight design Suitable for USB charger and power-bank testing Supports QC2.0 / QC3.0 according to available product information 📋 Technical Specifications Product Type: 10-in-1 USB Digital Tester Model: KWS-MX18 Input Voltage Range: DC 4–30V Current Measurement: 0–5.1A Power Measurement: 0–150W Capacity Measurement: 0–999999mAh Energy Measurement: 0–999999mWh Timing Range: 0–99 Hours Charging Resistance: 0–999.9Ω Internal Temperature: 0–80°C Positive Voltage Measurement: 0–10V Negative Voltage Measurement: 0–10V Memory Groups: 1–9 Display: Digital LCD Material: ABS Dimensions: Approximately 56.6 × 24.7 × 11.2mm Weight: Approximately 13.9g Input Connector: USB Output Connector: USB Function Button: Yes 🔍 10 Measurement Functions Voltage: 4–30V DC Current: 0–5.1A Power: 0–150W Capacity: 0–999999mAh Energy: 0–999999mWh Charging Time: 0–99 hours Charging Resistance: 0–999.9Ω Positive Voltage: 0–10V Negative Voltage: 0–10V Internal Temperature: 0–80°C 💾 Memory Function The KWS-MX18 can store charging measurement information in 9 separate memory groups. This allows you to compare charging capacity and energy measurements from different chargers or devices. The stored data can be viewed using the function button, and an individual memory group can be cleared by holding the button for approximately 3 seconds. 🔘 Button Functions Single Press: View stored measurement data from memory groups 1–9. Long Press: Clear the currently selected memory group. Double Press: Change the display page. Calibration: The device supports voltage and current calibration according to the supplied manual. 🔌 Applications USB Charger Testing Mobile Charger Testing Power Bank Testing USB Port Testing Mobile Phone Charging Analysis USB Cable Testing Power Supply Monitoring DC Power Measurement Electronics Troubleshooting DIY Electronics Projects Charger Performance Testing Battery Charging Analysis 🛠️ How to Use Connect the KWS-MX18 in-line between the USB power source and the USB-powered device. Once powered, the LCD displays the measured electrical parameters. You can use the function button to change display pages and access stored measurement data. It is particularly useful for comparing chargers, power banks, cables, and USB ports by monitoring actual voltage, current, power, capacity, and energy delivered. 📦 Package Includes 1 × KWS-MX18 10-in-1 USB Digital Tester ⚠️ Color Note: Color: White / Black Color will be shipped depending on stock availability. Any one color (White or Black) may be shipped based on available stock. Specific color cannot be guaranteed. ⚠️ Precautions Do not exceed the specified 30V DC input voltage. Do not exceed the specified current measurement range. Ensure correct USB connection direction before use. Keep the tester away from water and excessive moisture. Do not use it for measuring mains AC voltage. The device is intended for DC/USB power measurement. Actual measurement accuracy can depend on the connected source, load, cable, and operating conditions.
Black Plastic 3×18650 Battery Holder or Case Series Connection With Wire
[Lithium Battery Holder] Black Plastic 3×18650 Battery Holder – Series Connection The Black Plastic 3×18650 Battery Holder is designed to securely hold three 18650 lithium-ion battery cells in series configuration. It provides a convenient and organized way to mount 18650 cells for DIY battery packs, portable electronics, power supplies, LED projects, and other battery-powered applications. The holder is made from durable plastic and features mounting holes for secure installation using suitable screws. It is supplied with red and black connecting wires for convenient connection to an external circuit. ⭐ Key Features Designed for 3 × 18650 battery cells Series connection Black plastic construction Without cover Secure battery positioning Easy installation Built-in mounting holes Red and black connecting wires Suitable for DIY battery pack projects Compact and lightweight design 📋 Technical Specifications Product Type: 18650 Battery Holder Battery Capacity: 3 Cells Battery Type: 18650 Li-Ion Cell Configuration: 3S / Series Connection Nominal Output Voltage: Approximately 11.1V with 3.7V cells Fully Charged Voltage: Approximately 12.6V Material: Plastic Color: Black Cover: Without Cover Connection Wires: Red and Black Mounting: Screw Mount Mounting Holes: Yes Recommended Screw Size: Approximately 3mm Application: Battery Pack / Portable Electronics 🔌 Connection The three 18650 cells are connected in series, increasing the total voltage while maintaining the capacity of a single cell. With standard 3.7V nominal cells, the pack is approximately 11.1V nominal and 12.6V when fully charged. The red wire is the positive connection and the black wire is the negative connection. 🔧 Applications DIY 18650 Battery Packs 3S Lithium-Ion Battery Packs Portable Electronics LED Lighting Projects DIY UPS Projects Arduino Projects ESP8266 / ESP32 Projects Rechargeable Electronics Battery-Powered Devices Electronics Prototyping 📦 Package Includes 1 × 3×18650 Battery Holder / Case – Series Connection, Without Cover ⚠️ Precautions Use only compatible 18650 Li-Ion cells. Use three cells with matching capacity, chemistry, age, and charge condition. Use a suitable 3S BMS/protection and charging circuit. Do not mix damaged or mismatched cells. Check polarity carefully before installation. Do not short-circuit the battery terminals. Do not use damaged, swollen, or leaking cells. Ensure the holder and wiring are securely installed.
16 sq mm Copper Ring Lug Cable Terminal
[Terminal Connector] 16 sq mm Pure Copper Ring Lug Cable Terminal The 16 sq mm Pure Copper Ring Lug Cable Terminal is a high-quality electrical cable lug designed for making secure and reliable connections in high-current electrical systems. Made from pure copper, it provides excellent electrical conductivity and a strong mechanical connection between the cable and the terminal point. The ring lug design allows the terminal to be securely fastened to battery terminals, busbars, studs, bolts, and other electrical connection points. It is suitable for battery packs, inverters, UPS systems, solar installations, automotive wiring, and industrial electrical applications. The compact construction provides a reliable connection while allowing easy installation using a suitable crimping tool. The terminal is ideal for applications where a strong and low-resistance electrical connection is required. ⭐ Key Features Made from pure copper Designed for 16 sq mm cable Ring lug terminal design Excellent electrical conductivity Strong and reliable mechanical connection Suitable for high-current applications Easy bolt and stud mounting Suitable for battery and power wiring Ideal for electrical and DIY applications 📋 Technical Specifications Product Type: Copper Ring Cable Lug Material: Pure Copper Compatible Cable Size: 16 sq mm Terminal Type: Ring Lug Finish: Natural Copper / Tinned, depending on variant Connection Type: Bolt / Stud Mount Application: High-Current Electrical Connections 🔧 Applications Lithium Battery Packs LiFePO₄ Battery Systems Lead-Acid Batteries Inverter Connections UPS Systems Solar Power Systems Automotive Wiring Electrical Panels Power Distribution Industrial Wiring DIY Battery Projects 📦 Package Includes 1 × 16 sq mm Pure Copper Ring Lug Cable Terminal ⚠️ Precautions Select the correct lug according to the 16 sq mm cable size and required mounting hole diameter. Use a suitable cable-lug crimping tool for a secure connection. Ensure the cable is properly inserted and crimped before use. Do not exceed the safe current capacity of the cable and terminal assembly. Ensure all electrical connections are properly insulated and secured.