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Digital USB Mobile Power Charging Current Voltage Tester Meter
[Ammeter and Voltmeter] Digital USB Mobile Power Charging Current Voltage Tester Meter The Digital USB Mobile Power Charging Current Voltage Tester Meter is a compact USB testing device designed to measure and display charging voltage and current in real time. It is useful for checking the power output of USB chargers, power banks and other USB-powered devices. ⭐ Key Features Precise current and voltage measurement Simultaneous voltage and current display Bright digital LCD display Straight USB connector design USB Type-A Male input and USB Type-A Female output Compact and lightweight Easy to connect and use Suitable for USB chargers and power banks Compatible with USB-powered devices 📋 Technical Specifications Product Name: Digital USB Mobile Power Charging Current Voltage Tester Meter Color: As per available stock Input Voltage: 3.5V–7.0V Output Voltage: 3.5V–7.0V Current Measurement Range: 0A–3A Voltage Accuracy: ±1% Current Accuracy: ±1% Display Type: Digital LCD Display Screen Size: 0.91 inch Data Display: Voltage and Current simultaneously Power Consumption: ≤0.1W Interface: USB Type-A Male (Input) / USB Type-A Female (Output) Measurement Frequency: 2 times per second Operating Temperature: 0°C–45°C Material: ABS Plastic Dimensions: 64 × 23 × 15mm Weight: 15g Compatibility: USB-powered devices 🔧 Applications Mobile charger testing USB charger testing Power bank testing USB power supply testing Mobile phone charging analysis USB device testing Electronics troubleshooting DIY electronics projects Checking charging voltage and current 🛠️ How to Use Insert the USB Type-A Male connector into the USB charger, power bank or USB power source. Connect the USB-powered device to the USB Type-A Female output. The digital display will show the voltage and charging current. Monitor the readings during charging or testing. 📦 Package Includes 1 × Digital USB Mobile Power Charging Current Voltage Tester Meter ⚠️ Important Notes Do not exceed the specified voltage and current measurement ranges. This tester is intended for USB/DC applications. Actual readings may vary depending on the charger, cable and connected device. Use within the specified operating temperature range.
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.
10-in-1 USB & Type-C Digital Tester – IPS Voltmeter, Ammeter, Impedance & Capacity Meter
[Ammeter and Voltmeter] The 10-in-1 USB & Type-C Digital Power Tester is a multifunction USB measurement instrument developed for engineers, technicians, hobbyists, and electronics enthusiasts. It accurately monitors USB charging performance while providing comprehensive electrical measurements for USB-A and USB Type-C devices. Equipped with a bright IPS true-color LCD display, the tester simultaneously displays ten important charging parameters including Voltage, Current, Power, Capacity (mAh), Energy (mWh), Cable Resistance, Temperature, Charging Time, D+ Voltage, and D− Voltage. The tester features both USB-A and USB Type-C input/output interfaces, allowing compatibility with traditional USB chargers as well as modern USB-C Power Delivery devices. It supports testing of fast chargers, mobile phones, tablets, laptops, power banks, USB cables, and various USB-powered electronics. With support for measurements up to 150W and 5A, this tester is suitable for high-power USB-C PD chargers while consuming less than 20mA of operating current. Built-in control buttons allow users to switch display modes, perform fast-charge diagnostics, and manage measurement functions easily. Its compact design makes it an excellent tool for electronics repair, charger verification, cable testing, battery capacity measurement, laboratory work, and DIY electronics projects. 🔹 Key Features Dual Interface: USB-A & USB Type-C Input/Output Supports USB PD and Fast Charging IPS Full Color LCD Display Measures Voltage, Current and Power Capacity (mAh) & Energy (mWh) Measurement Cable Resistance (Impedance) Measurement Internal Temperature Monitoring USB D+ / D− Voltage Detection Charging Timer Function High Accuracy Measurement Low Self Power Consumption Compact Portable Design Easy Operation with Dedicated Function Buttons 🔹 Technical Specifications Product Type: USB Digital Power Tester Display: IPS True Color LCD Input Interface: USB-A / USB Type-C Output Interface: USB-A / USB Type-C Maximum Power Measurement: 150W Maximum Current: 5A Voltage Measurement: USB Standard & USB-C PD Power Measurement Range: 0–150W Current Measurement: Up to 5A Capacity Measurement: mAh Energy Measurement: mWh Impedance Measurement Range: 1–999.9Ω Temperature Measurement: 0°C to 80°C USB D+ Voltage Range: 0–2.99V USB D− Voltage Range: 0–2.99V Timer Range: 999 Hours 59 Minutes Refresh Rate: Approximately 500ms Self Power Consumption: <20mA Operating Buttons: Mode / Power Dimensions: 76.9 × 38 × 11 mm 🔹 Applications This USB tester is suitable for: USB charger testing USB-C PD charger testing Power bank capacity testing Mobile charger verification Fast charging protocol diagnostics USB cable resistance testing Laptop USB-C charger testing Electronics repair DIY electronics projects Laboratory measurements Battery charging analysis Quality inspection of USB power supplies 🔹 Package Includes 1 × 10-in-1 USB & Type-C Digital Power Tester 🔹 Frequently Asked Questions (FAQ) What does "10-in-1" mean? It measures ten important parameters: Voltage, Current, Power, Capacity, Energy, Impedance, Temperature, Charging Time, D+ Voltage, and D− Voltage. Does it support both USB-A and USB Type-C? Yes. It features both USB-A and USB Type-C input and output interfaces. What is the maximum power it can measure? Up to 150W. What is the maximum current supported? Up to 5A. Can it test USB-C laptop chargers? Yes. It supports high-power USB-C PD chargers up to 150W. Can it measure charging cable quality? Yes. It measures cable impedance from 1Ω to 999.9Ω. Does it display temperature? Yes. It includes an internal temperature sensor with a range of 0°C to 80°C. Does it require batteries? No. It is powered directly from the connected USB source. Can it measure power bank capacity? Yes. It records charging capacity in mAh and mWh. Does it support fast charging protocols? Yes. It can monitor USB D+ and D− voltages, helping identify fast charging protocol handshakes.
0.28 inch 3.5-30V Two Wire DC Voltmeter Yellow
[Ammeter and Voltmeter] This is tiny and compact digital voltmeter with red LED Display. 0.28inch 3.5-30V Two Wire DC Voltmeter Yellow Panel requires only a few minutes of configuration and is as simple as directly connecting wires to the source you want to measure and seeing the LED blink!!!! The red wire is to connect to the positive pole, the black wire is to connect to the negative pole. No need to worry even if there is any connection mismatch of the wires, the electric circuit wont be a boom because it features reverse polarity protection. This voltmeter doesn't need external drive working power, it can work with measuring voltage, the working voltages range is 3.5-30V. To reach the best measurement accuracy, this voltmeter will automatically move the decimal points position according to the different measuring voltage. When it measures the voltage below 10V, it will display two places after the decimal point. When it measures the voltage above 10V, it will display one place after the decimal point. This voltmeter can be used to measure the storage battery's voltage in motorcycles and cars and also can grasp the storage batterys status. It also can be used to measure other voltage. 30V is the voltmeters maximum operating limited voltage, please leave enough margin when working, to avoid voltmeters permanent damage because of an electrical spark, power supply ripple, or other too high abrupt change of voltage. Very bight and decent LED Display is ready to measure the dc voltages in the range of 3.5V to 30V. Connections : Red Wire: source +ve terminal. Black Wire: Source -ve terminal. Note: The display weight and Dimensions may have2% error. Features : Very small and lightweight voltmeter module. Very handy and easy to use. Green LED display. Dont need the external power supply because it is a self-powered version of this display. Best operates in the working voltage range of 5V to 24V 100% Brand new and high quality. 📑 Additional Information Accuracy: 0.1 VColor: YellowWires: 2 (Two-Wire Design)Display ON Voltage: 2.5 VOperating Voltage: 3.6 V ~ 28 V DCCurrent Consumption: 15 mARefresh Speed: 200 ms (one update)Minimum Input Voltage: 3.6 VMaximum Input Voltage: 28 VOperating Temperature: -10°C to 60°CMounting Hole Distance: 3 cmHeight: 0.72 cmLength: 1.3 cmWidth: 3 cmWeight: 3 g Package Includes : 1 x 0.72 cm (0.28 inch) 3.5-30V Two Wire DC Voltmeter Yellow * Product Images are shown for illustrative purposes only and may differ from actual product.
0.28 inch 3.5-30V Two Wire DC Voltmeter Green
[Ammeter and Voltmeter] This is tiny and compact digital voltmeter with red LED Display. 0.28inch 3.5-30V Two Wire DC Voltmeter Green Panel requires only a few minutes of configuration and is as simple as directly connecting wires to the source you want to measure and seeing the LED blink!!!! The red wire is to connect to the positive pole, the black wire is to connect to the negative pole. No need to worry even if there is any connection mismatch of the wires, the electric circuit wont be a boom because it features reverse polarity protection. This voltmeter doesn't need external drive working power, it can work with measuring voltage, the working voltages range is 3.5-30V. To reach the best measurement accuracy, this voltmeter will automatically move the decimal points position according to the different measuring voltage. When it measures the voltage below 10V, it will display two places after the decimal point. When it measures the voltage above 10V, it will display one place after the decimal point. This voltmeter can be used to measure the storage battery's voltage in motorcycles and cars and also can grasp the storage batterys status. It also can be used to measure other voltage. 30V is the voltmeters maximum operating limited voltage, please leave enough margin when working, to avoid voltmeters permanent damage because of an electrical spark, power supply ripple, or other too high abrupt change of voltage. Very bight and decent LED Display is ready to measure the dc voltages in the range of 3.5V to 30V. Connections : Red Wire: source +ve terminal. Black Wire: Source -ve terminal. Note: The display weight and Dimensions may have2% error. Features : Very small and lightweight voltmeter module. Very handy and easy to use. Green LED display. Dont need the external power supply because it is a self-powered version of this display. Best operates in the working voltage range of 5V to 24V 100% Brand new and high quality. Additional information Accuracy 0.1 V Color Green Wires 2 Display ON Voltage (V) 2.5 Operating Voltage (VDC) 3.6 ~ 28 Current Consumption (mA) 15 Refresh Speed (ms) 200 (one time) Minimum Input (V) 3.6 Highest Input (V) 28 Operating Temperature (C). -10 to 60 Holes for Mounting 3 cm Height (cm) 0.72 cm Length (cm) 1.3 cm Width (cm) 3 cm Weight (gm) 3 gm Package Includes : 1 x 0.72 cm (0.28 inch) 3.5-30V Two Wire DC Voltmeter Green * Product Images are shown for illustrative purposes only and may differ from actual product.
0.28 inch 3.5-30V Two Wire DC Voltmeter Blue
[Ammeter and Voltmeter] This is tiny and compact digital voltmeter with red LED Display. 0.28inch 3.5-30V Two Wire DC Voltmeter Blue Panel requires only a few minutes of configuration and is as simple as directly connecting wires to the source you want to measure and seeing the LED blink!!!! The red wire is to connect to the positive pole, the black wire is to connect to the negative pole. No need to worry even if there is any connection mismatch of the wires, the electric circuit wont be a boom because it features reverse polarity protection. This voltmeter doesn't need external drive working power, it can work with measuring voltage, the working voltages range is 3.5-30V. To reach the best measurement accuracy, this voltmeter will automatically move the decimal points position according to the different measuring voltage. When it measures the voltage below 10V, it will display two places after the decimal point. When it measures the voltage above 10V, it will display one place after the decimal point. This voltmeter can be used to measure the storage battery's voltage in motorcycles and cars and also can grasp the storage batterys status. It also can be used to measure other voltage. 30V is the voltmeters maximum operating limited voltage, please leave enough margin when working, to avoid voltmeters permanent damage because of an electrical spark, power supply ripple, or other too high abrupt change of voltage. Very bight and decent LED Display is ready to measure the dc voltages in the range of 3.5V to 30V. Connections : Red Wire: source +ve terminal. Black Wire: Source -ve terminal. Note: The display weight and Dimensions may have2% error. Features : Very small and lightweight voltmeter module. Very handy and easy to use. Blue LED display. Dont need the external power supply because it is a self-powered version of this display. Best operates in the working voltage range of 5V to 24V 100% Brand new and high quality. Additional information Accuracy 0.1 V Color Blue Wires 2 Display ON Voltage (V) 2.5 Operating Voltage (VDC) 3.6 ~ 28 Current Consumption (mA) 15 Refresh Speed (ms) 200 (one time) Minimum Input (V) 3.6 Highest Input (V) 28 Operating Temperature (C). -10 to 60 Holes for Mounting 3 cm Height (cm) 0.72 cm Length (cm) 1.3 cm Width (cm) 3 cm Weight (gm) 3 gm Package Includes : 1 x 0.72 cm (0.28 inch) 3.5-30V Two Wire DC Voltmeter Blue * Product Images are shown for illustrative purposes only and may differ from actual product.
0.28 inch 3.5-30V Two Wire DC Voltmeter Red
[Ammeter and Voltmeter] This is tiny and compact digital voltmeter with red LED Display. 0.28inch 3.5-30V Two Wire DC Voltmeter Red Panel requires only a few minutes of configuration and is as simple as directly connecting wires to the source you want to measure and seeing the LED blink!!!! The red wire is to connect to the positive pole, the black wire is to connect to the negative pole. No need to worry even if there is any connection mismatch of the wires, the electric circuit wont be a boom because it features reverse polarity protection. This voltmeter doesn't need external drive working power, it can work with measuring voltage, the working voltages range is 3.5-30V. To reach the best measurement accuracy, this voltmeter will automatically move the decimal points position according to the different measuring voltage. When it measures the voltage below 10V, it will display two places after the decimal point. When it measures the voltage above 10V, it will display one place after the decimal point. This voltmeter can be used to measure the storage battery's voltage in motorcycles and cars and also can grasp the storage batterys status. It also can be used to measure other voltage. 30V is the voltmeters maximum operating limited voltage, please leave enough margin when working, to avoid voltmeters permanent damage because of an electrical spark, power supply ripple, or other too high abrupt change of voltage. Very bight and decent LED Display is ready to measure the dc voltages in the range of 3.5V to 30V. Connections : Red Wire: source +ve terminal. Black Wire: Source -ve terminal. Note: The display weight and Dimensions may have2% error. Features : Very small and lightweight voltmeter module. Very handy and easy to use. Red LED display. Dont need the external power supply because it is a self-powered version of this display. Best operates in the working voltage range of 5V to 24V 100% Brand new and high quality. Additional information Accuracy 0.1 V Color Red Wires 2 Display ON Voltage (V) 2.5 Operating Voltage (VDC) 3.6 ~ 28 Current Consumption (mA) 15 Refresh Speed (ms) 200 (one time) Minimum Input (V) 3.6 Highest Input (V) 28 Operating Temperature (C). -10 to 60 Holes for Mounting 3 cm Height (cm) 0.72 cm Length (cm) 1.3 cm Width (cm) 3 cm Weight (gm) 3 gm Package Includes : 1 x 0.72 cm (0.28 inch) 3.5-30V Two Wire DC Voltmeter Red * Product Images are shown for illustrative purposes only and may differ from actual product.
0.28 inch Digital Voltmeter Ammeter DC 100V 50A LED Amp Volt Meter With Shunt
[Ammeter and Voltmeter] The 0.28 Inch Digital DC Voltmeter Ammeter 100V 50A with Shunt is a compact and high-accuracy dual LED panel meter designed to measure DC voltage and current simultaneously on a single display. With a measurement range of up to 100V DC and 50A, this meter is ideal for monitoring battery systems, power supplies, solar setups, chargers, and DIY electronics projects. This panel meter features a bright dual LED display that clearly shows voltage and current values at the same time, making real-time monitoring easy and convenient. Its small size and lightweight design allow easy installation in panels, enclosures, and control boxes. The module comes with two wiring harnesses — one for powering the meter (red and black pair) and another for measurement and shunt connection. The meter operates from an independent 5V power supply (recommended) for best accuracy. While it can be powered from 6–30V DC, using the same supply as the measured source may slightly affect current readings. A 50A external shunt is included for accurate current measurement. Different wiring variants may be shipped, but functionality remains the same. This meter is an excellent choice for battery packs, solar systems, DC power supplies, electric vehicles, inverters, and lab projects. ⭐ KEY FEATURES ✔ Measures DC Voltage up to 100V✔ Measures DC Current up to 50A (with included shunt)✔ Dual LED Display – Shows volts & amps simultaneously✔ 0.28 Inch Compact Panel Size✔ High resolution 0.1V measurement✔ Small, lightweight & easy to install✔ Separate power input harness for stable readings✔ Ideal for battery & DC system monitoring✔ Brand new, high-quality module 🔧 TECHNICAL SPECIFICATIONS Display Size: 0.28 inch LED Voltage Measurement Range: 0 – 100V DC Current Measurement Range: 0 – 50A DC Voltage Resolution: 0.1V Meter Power Supply: 5V DC (recommended) Supply Range: 6V – 30V DC (separate supply preferred) Display Type: Dual LED (Volt + Amp) Shunt: External 50A shunt included Mounting Type: Panel mount Wiring: Dual harness (power + measurement) ⚠️ IMPORTANT NOTES Use a separate 5V supply for best accuracy If input voltage is above 5V, use a buck converter Wiring color/order variants may differ but function is same Incorrect wiring can damage the module 🎯 APPLICATIONS Battery monitoring systems Solar power setups DC power supplies EV & e-bike systems Inverter projects DIY electronics labs Charging stations 📦 PACKAGE INCLUDES 1 × 0.28″ Dual LED DC Volt Ammeter Panel Meter 1 × 50A Current Shunt
Out of stock0.28 inch DC 100V 100A LED Digital Ammeter-Voltmeter With Shunt
[Ammeter and Voltmeter] This is 0.28 inch DC 100V 100A LED Digital Ammeter–Voltmeter With Shunt. This meter will measure up to 100 VDC with a 0.1-volt resolution. One thing to note is, this meter has 2 wiring harnesses. One harness is to provide power for the meters, that’s the 2 poles with a RED and a BLACK lead. Small size, portable, the magnitudes of voltage, and current are displayed on the same screen at the same time. This can be supplied anywhere from 6 volts DC up to 30 VDC. This is a separate power supply that is isolated from the source, it is possible to use the same supply but it seems to affect the amp meter reading. The 3 wire harness is used for a ground that connects directly to the battery or supply ground of the load. Note: There are different wiring variants with the same working functionality is available which will be shipped randomly. If the input voltage is more than 5V then please use the buck converter. Features : It measures up to 100V and 100A DC. Very handy and small in size. It requires a power supply of 5V. 100% Brand new and high quality. Package Includes: 1 x Dual LED Panel Ampere Voltage Meter. 1 x Current Shunt.
Digital Voltmeter (0-100V) and Ammeter (10 A) Dual Led Voltage Current Measurement Module
Specifications:- Input Voltage – 4.5V to 30V DC Input Current – <= 20mA Display Color – Red (Voltage) , Blue (Current) Measuring Voltage Range – 0V to 100V DC Measuring Currrent Range – 0A to 10A Measurement Accuracy – 1% Minimum Voltage Resolution – 0.1V Minimum Current Resolution – 0.01A Size – 48x29x21mm Note:- Maximum Input Voltage should not exceed 30V otherwise there is a danger of burning Wiring:- Black line (thin): vacant or buck circuit (module) Negative Red line (thin): power supply Positive Black line (thick): COM, common measuring Red line (thick): PW+, measuring terminal voltage input positive Yellow line (thick): IN+, current input Positive Package Contains:- 1 x Digital Voltmeter & Ammeter Module 1 x Two wire thin connector 1 x Three wire thin connector
0.28inch 0-100V Three Wire DC Voltmeter
[Ammeter and Voltmeter] This is tiny and compact digital voltmeter with a yellow LED Display. The DC 0-100V 3 Wire Yellow LED Display Digital Voltage Voltmeter Panel requires only a few minutes of configuration and is as simple as directly connecting wires to the source you want to measure and seeing the LED blink!!!! The red wire is to connect to the positive pole, the black wire is to connect to negative pole and the yellow/white wire is to connect to the positive pole of that source or another source across which we meant to measure the voltage. While measuring the supply voltage of another source make sure that negative pole is joined common. No need to worry even if there is any connection mismatch of the wires, the electric circuit won’t be a boom because it features reverse polarity protection. To reach the best measurement accuracy, this voltmeter will automatically move the decimal point’s position according to the different measuring voltage. When it measures the voltage below 10V, it will display two places after the decimal point. When it measures the voltage above 10V, it will display one place after the decimal point. This voltmeter can be used to measure the storage battery’s voltage in motorcycles and cars and also can grasp the storage battery’s status. It also can be used to measure other voltage. 100V is the voltmeter’s maximum operating limited voltage, please leave enough margin when working, to avoid voltmeter’s permanent damage because of an electrical spark, power supply ripple, or other too high abrupt change of voltage. Very bight and decent LED Display is ready to measure the dc voltages in the range of 0V to 100V. Connections : Red Wire: Positive of the Power supply Black Wire: Negative of the Power supply and also used as the negative of the measurement voltage source Yellow/White/Blue: Positive of the measurement voltage source CASE 1: If you have only one power source to give Power as well as to measure the voltage CASE 2: If you have to measure the voltage of another source then Note: The display weight and Dimensions may have ±2% error. Features : Very small and lightweight voltmeter module. Very handy and easy to use. Red/Green/Blue/Yellow LED display. Best operates in the working voltage range of 5V to 24V 100% Brand new and high quality. Package Includes : 1 x Red/Green/Blue/Yellow LED Display 3 Wire Digital Voltage Voltmeter Panel
0.36inch 4.5-30V Two Wire DC Voltmeter
[Ammeter and Voltmeter] This is tiny and compact digital voltmeter with red LED Display. 0.36inch 4.5-30V Two Wire DC Voltmeter Red Panel requires only a few minutes of configuration and is as simple as directly connecting wires to the source you want to measure and seeing the LED blink!!!! The red wire is to connect to the positive pole, the black wire is to connect to the negative pole. No need to worry even if there is any connection mismatch of the wires, the electric circuit won’t be a boom because it features reverse polarity protection. This voltmeter doesn’t need external drive working power, it can work with measuring voltage, the working voltage’s range is 3.5-30V. To reach the best measurement accuracy, this voltmeter will automatically move the decimal point’s position according to the different measuring voltage. When it measures the voltage below 10V, it will display two places after the decimal point. When it measures the voltage above 10V, it will display one place after the decimal point. This voltmeter can be used to measure the storage battery’s voltage in motorcycles and cars and also can grasp the storage battery’s status. It also can be used to measure other voltage. 30V is the voltmeter’s maximum operating limited voltage, please leave enough margin when working, to avoid voltmeter’s permanent damage because of an electrical spark, power supply ripple, or other too high abrupt change of voltage. Very bight and decent LED Display is ready to measure the dc voltages in the range of 4.5V to 30V. Connections : Red Wire: source +ve terminal. Black Wire: Source -ve terminal. Note: The display weight and Dimensions may have ±2% error. We also have the same module in two different colors as(click on the color name below for more information) Features : Very small and lightweight voltmeter module. Very handy and easy to use. Red/Blue/Green/Yellow LED display. Don’t need the external power supply because it is a self-powered version of this display. Best operates in the working voltage range of 5V to 24V 100% Brand new and high quality. Package Includes : 1 x 0.36inch 4.5-30V Two Wire DC Voltmeter Red/Blue/Green/Yellow