V33D 2 Wires Blue Light Display Mini Digital Voltage Meter, Measure Voltage: DC 4.5-120V

1. 100% brand new and high quality.
2. Small and lightweight, easy to carry.
3. Display devices use high bright LED digital tube, stunning display effect.
4. With reverse polarity protection, reverse not burned.
5. The voltmeter only two wires, wiring simple and reliable performance.
6. Suitable for measuring DC voltage, suitable for 6V / 12V storage battery.
7. 30V meter don't use on 24V battery, Because the voltage will produce close to the limit of the meter, leaving too few remainder to the meter, it will cause a higher voltage pulse when charging and electrical work.