Specifications:Dimensions: 35X23X16mmMeasuring range: DC 4.5-30V Open hole size: 32X19mmMinimum input: DC 4.5V (below minimum voltage, measurement is inaccurate or not displayed)Wire length: 15cmMaximum input: DC 30V (above this voltage there is danger of burning)Net weight: 8g Add-on error: 1% (+/-1 word)Gross weight: 9g (including package)Display color: red green blue optionalRefresh rate: is about 200ms/times Power Supply: No Current Consumption: Less than 20mA, Usually 5-15mATouing Temperature: -10°C - 65°CVuing Introduction:1. The voltmeter wiring is simple, it only needs to take two lines, the red line is positive, the black line is negative, the table has anti-protection, the reverse line does not burn.2. The voltmeter does not need to be connected to the working power, it can work directly with the measuring voltage, the operating voltage range is 4.5-30V.3. For optimal measurement accuracy, the voltmeter will automatically shift the decimal point according to different measurement voltages. When measuring voltage below 10V, the decimal points are shown two; After measuring the 10V voltage, the decimal will show one.4. This voltmeter can be used to monitor the voltage of an electric bottle, such as motorcycle, car, etc. It can also be used for other voltage measurement purposes. Note: 1. 30V is the highest limit of the benchtop voltmeter using voltage, please pay attention when using leave enough margin for the table to avoid electric spark, power ripple or other mutations cause permanent damage to the voltmeter too high voltage.2. This voltmeter does not provide moisture, waterproof, shockproof, pollution protection, please pay attention when using or self-service.1 X Digital Voltmeter1.