Digital Voltmeter Display Red LED 2 Wire (

The wiring of this voltmeter is simple, only two wires need to be connected, the red wire is connected to the positive, and the black wire is connected to the negative. There is reverse connection protection in the meter, and the reverse connection does not burn. This voltmeter does not require an external working power supply, it can work directly with the measured voltage, and the working voltage range is as wide as 4.5-30V. In order to achieve the best measurement accuracy, the voltmeter will automatically move the position of the decimal point according to the difference of the measured voltage. Measuring voltage below 10V At the time, two digits are displayed after the decimal point; when measuring a voltage above 10V, one digit is displayed after the decimal point. This voltmeter can be used to monitor the battery voltage of motorcycles, automobiles, etc., and grasp the battery status in time. It can also be used for other voltage measurement purposes. Specifications Dimensions Length :48x width 29x thickness 16mm Hole Size :46x27mm Lead length :20cm net weight :17g Gross weight: 22g (including packaging) Measuring range: 4.5-30V .Low input :DC4.5V (below. Low voltage measurement is inaccurate or not displayed) .High input :DC30V (higher than this voltage may burn out) Allowable error :Accurate to 0.01V below 10V, 0.1V above 10V, tolerance 1% (+/- 1 word) Display method :Three digit 0.56″ LED digital tube Display color: Red Refresh rate:About 200mS/time Power supply :No power supply Current consumption :Less than 20mA, generally 5-15mA Operating temperature :-10?~65?