1.the voltmeter with full enclosure, potting fully waterproof design, a long soak in the water can still work without damage, more moisture, oil, dust, vibration.
2.the voltmeter display uses LED digital tube 0.28 inches.
3.the voltage meter wiring simple, just take two lines in the table have reverse protection, reverse does not burn.
Dimensions: As shown in the pictures
Type: 3 digits 0.28″
Led color: blue/red/green/yellow(Please leave note which color you want,or i will send you red color.thanks).
Range: dc 3.50-30.0V
Supply voltage: DC3.50-30.0V
Cable length: 85mm
Fixed hole diameter: 3mm(approx.)
Reading per second: 2
The power consumption: Static about 15 mA
Accuracy: 1% (±1 digit)
Operating Temperature: -10°C~65°C
Potting material Epoxy-resin Glue
Red: Power Supply +, Measure +
Black: Power Supply -, Measure -
Reverse polarity protection: Yes
used for battery voltage measuring on electric vehicles, electric cars, electric motor cars, and so on.