DC Digital Voltmeter Green 3.5-30V 0.28 Inch

This is tiny and compact digital voltmeter with a green LED Display. The DC 3.5-30V, 2 wire Green LED Display Digital Voltage Voltmeter Panel requires only a few minutes of configuration and is as simple as directly connecting wires to the source you want to measure and seeing the LED blink. Specifications: Display mode:  0.28 LED digital tube Update rate: About 500 MS/time Physical size: 30x12x8.5mm (L*W*H including installation ear) Power supply: no need for power supply, direct use of test voltage as power supply Lead wire length: 10 cm Minimum input: 3.50 V Maximum input: 30 V Measuring range: DC3.50-30 V Operating temperature: -10 degrees ~ 65 degrees Measurement accuracy: ± (1% + 2 digits) Mounting holes distance: 26mm