This three digits voltmeter has 3 wire connections. Its operating
power is separated from the mearsurement input wires so it has a
wide measuring range from 0 to 100 volt.
Supply voltage: DC 4.5V ~ 30V
Measuring range: DC 0V ~ 100V
Working current: <30mA
Display: 0.28 inch LED, Red Color
Dimensions: 31 × 12.0 × 9mm
Mounting hole: 23 × 10 mm
Measurement rate: ≥200mS / times
Accuracy: 1% (+/- 1 digit)
Wiring : Red : Power supply +, Black : Power supply -, Input-yellow +
Price: $2.80