Product selling points: 1. The volume of this voltmeter is displayed by 0.28 inch high-quality digital tube, with the range of DC 3.00-30.0V, and has the reverse connection protection function, 2. Note that the maximum input voltage shall not exceed 30V. 3. When the voltage is lower than 2.6V, the display brightness will darken, but it will not affect the correct measurement. 4. In order to achieve the best measurement accuracy, the voltmeter will automatically move the decimal point according to the different measured voltages. 5. When measuring the voltage below 10V, two digits will be displayed after the decimal point; When measuring the voltage above 10V, one digit will be displayed after the decimal point. 6. The voltmeter adopts a fully enclosed enclosure and a full waterproof design. It can work normally without damage even after being immersed in water for a long time, and it is more moisture-proof and oil proof Dirt, dust and vibration prevention 7. This voltmeter can be used to monitor the battery voltage of baby carriages, electric vehicles, motorcycles, automobiles, etc., and master the battery status in time. It can also be used for other voltage measurements Quantitative use Technical parameter Working voltage: DC3.0-30.0V (with reverse connection protection function) Detection voltage: DC3.0-30.0V Working current: