(2RED) DC 4.5~30V Digital Mini Voltmeter Voltage Display, 0.56" LED Display Panel Voltage Tester Meter, Car Motorcycle Battery Monitor Voltage Gauge, Battery Voltage Tester, LED Digital Voltmeter - feather0061-6

• MINI VOLTMETER: Small in size and light in weight,quite easy and convenient to carry out. There are three colors of blue,green and red, No independent power supply is needed. The voltage display meter is perfect to monitor the condition of the battery, for electromobile, car, trailer, truck, boat, etc. HIGH ACCURACY: The smart chip of the digital voltmeter features quick response and accuracy. The accuracy is ±1%: ±0.1. Refresh Rate: 300ms/time. BRIGHT & CLEAR DISPLAY: The DC volt meter has a three-digit 0.56-inch digital LED tube, easy to read even in dim light. Working Current: ＜13mA. Operating temperature: -20℃～+65℃.Measuring range: 0.00V-30.0V. REVERSE POLARITY SAFETY PROTECTION: The voltmeter wiring is simple, only need to connect the two wires. The voltage gauge meter won't burn out if the reverse polarity is applied, but the screen will display nothing. To ensure proper connection, simply connect the red wire to the positive electrode and the black wire to the negative. DC 4.5~30V. If the input voltage is higher than 30V, it may be permanently damaged!