HALJIA 0.36 Inch DC 4.80V-30.0V Voltmeter 2 wires Red LED Digital Display Panel Voltage Meter Volt Regulator for Car Automotive Battery Tester

• High accurancy
• Two-wires connection: simply connect the red and black wire to positive and negative pole respectively.
• With reversed connection protection, meaning meter will not burn when connected reversely.
• 0.36" LED digits visible display; it requires low voltage to start; if volt is less than 3.5V, the LED will dim but not affect measurement.
• It can test voltage of 18650 or lithium battery, NiMH battery pack, moto, auto, car, etc; screw potentiometer in back side for more accurate results.

Feature: Shred size: 23mm x 15mm Thickness: 10mm Mounting hole spacing: 28mm Wiring: Red: Power Supply +, Measure voltage+, (4.8V ~30V DC) Black: Power Supply-, Measure the voltage- Cable length: 15cm Measuring range: 0~30V; Power supply: DC 4.8~30V; Max. input: DC 30V; Tolerance: +/-1%, +/-0.1V (>10V/=10V), +/0.02 (<9.99V/=9.9V); Input impedance: >100Kohm; Working current: red: <23mA; Refresh rate: 300ms /times; Display: 3-digit 0.36" LED; Display color: red; Operating temperature: -10'C ~ 65'C Some applications: Measure18650 batteries Measure Cell Phone Lithium Batteries Measure nickel hydride battery Fairs Cars Motorcycles battery voltage, etc. Packing List: 1 x Digital Voltmeter Panel Mount