V40D 2 Wires Blue Light Display Mini Waterproof IPX4 Digital Voltage Meter, Measure Voltage: DC 15-120V

V40D 2 Wires Blue Light Display Mini Waterproof IPX4 Digital Voltage Meter, Measure Voltage: DC 15-120V 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. Measuring Range: DC 15-120V. 7. Operation temperature: -10~65 degrees Celsius. 8. Red wire is connected to positive pole, and black wire to negative pole.