0.56 Inch Two-Wire Digital Voltage Display 3 Bits DC 4.5-30V LED Voltmeter Waterproof Display Voltage Tester Meter with Plastic Shell (Blue, 8 Pack)

About this item 0.56″ 2-wire digital voltage display three color options: red, green, blue. It can test directly and no need of power supply, and the working voltage range is 4.5-30V, easy to install and use. Easy to connect, only two wires need to be connected, the red wire to connect positive, black wire to connect negative. The voltmeter has reverse protection, reverse does not burn. Accurate to 0.01V below 10V, accurate to 0.1V above 10V, 1% error allowed (±1). This voltmeter can be used to monitor the battery voltage of motorcycles and automobiles to grasp the battery status in time. It can also be used for other voltage measurement purposes.