Feature:1. The wiring of this voltmeter is simple. The conventional two wires are used, the red is connected to the positive, the black is connected to the negative, and the reverse connection is protected.2. Conventionally, no external working power supply is required, and the measuring voltage can be directly operated. The measuring voltage range is two-wire 2.50-30V, three-wire 100V.3. Wide voltage operation, red 2.50V low and safe pressure up to 40V, more than 40V may be damaged.4. When measuring voltages below 10V, two digits are displayed after the decimal point; when measuring voltages above 10V, one digit is displayed after the decimal point.

Measuring range Two-wire DC2.50~32.0V Power supply range No need to supply power separately.
The measured voltage <40V, higher than 40V may be damaged. Test accuracy 1%. >10V error 0.1V; <10V 0.03V Input resistance >50K Working current <30mA Refresh rate About 100mS once Display specification Three digit 0.28 LED digital tubes Lead length Default 20cm Dimensions 30 x 11.5 x 9 mm Hole Size Pitch: 26mm Aperture: 2.4mm Net weight 4g Operating temperature -10 to +80 C Working humidity 10 to 80% Working pressure 80 to 106 kPa

Package includes:
10 x Voltage meter