Features: This DC voltage meter is small in size, compact design. It can measure and show voltage, the measuring range is 0~100V DC. The voltage meter uses 0.28inch 3-digit LED display, clear to read. There are 3 wires, easy to connect; it supports reverse input protection, will not burn out. Widely used for kids' cars, electric bikes, motorcycles to monitor battery voltage, and many other voltage metering purpose. Specification: Color: Red, Yellow, Green (Optional) Metering Range: 0-100V Working Voltage: 4-30V Working Current: <30mA Operating Temperature: -10~65℃ Test Accuracy: 3% Power Supply: If test voltage is below 4V or over 30V, it will need independent power supply, power supply voltage is 4V-30V) Certificate: CE ROHS Size: 3*1cm/1.2*0.4in Weight: Approx.9g/0.3oz Package list: 1 * Voltage Meter 1、This DC voltage meter is small in size, compact design. 2、It can measure and show voltage, the measuring range is 0~100V DC. 3、The voltage meter uses 0.28inch 3-digit LED display, clear to read. 4、There are 3 wires, easy to connect; it supports reverse input protection, will not burn out. 5、Widely used for kids' cars, electric bikes, motorcycles to monitor battery voltage, and many other voltage metering purpose.