12 Volt Digital Voltmeter, DROK 0.56" DC 3-30V 12v Voltage Tester Gauge Green Bright LED Display Two Wires Volt Meter Detector for Solar Battery Monitor Checker Car Motor Panel Mount

Technical Parameters:
Dimension: 48-29-22mm
Cutting size: 46-27mm
Measuring voltage range: DC 3-30V
Maximum input: DC 30V (if the input voltage is higher than DC30V, the voltmeter will be burnt)
Minimum input: DC 3V (if the input voltage is lower than DC 3V, the value will be inaccurate or not displayed)
Measurement accuracy: Less than 10V, accurate to 0.01V; More than 10V, accurate to 0.1V (allowable tolerance: 1% +/- 1 word)
Display: 3 digit 0.56'' LED digital tube
Font Color: Green
Refresh rate: about 200mS
No need power supply
Consuming current: less than 20mA (generally 5-15mA)
Operating temperature: -10°c-65°c
Wire length: 20cm
Reverse connection protection: YES
Method of wiring:
Red wire: Positive
Black wire: Negative
Note:
Please don't use this meter in 24V battery because when the battery is full-charged, its voltage will be about 30V
(the max input volt for this meter), and we don't suggest you use it in max volt of 30V.
Package Includes:
1- 0.56'' Voltmeter