Specifications:

Brand new and high quality.
Measuring range: DC 0V--30V.
Input range: DC 4.5V-30V(Max Input: DC 30V. The device can be damaged if input is over 30V).
Working Current: < 23mA.
Display Color: RED.
Display Mode: Three 0.36 "digital tube.
Measurement accuracy: ?1%.
Refresh rate: about 300mS / times.
Input impedance: > 100K.
Pitch of holes:28mm.
Aperture size :2.8mm.
Operation Temp: -10℃-+65℃.
Size:2.2cm x 1.4cm x 1cm.
Wiring:

Red:power supply +.
Black:power supply -, measure -.
White:measure +.
Package Included:

1/3 x Red Digital Voltmeter(s)