Features: Adopting high quality chip with sealed ABS waterproof shell, reliable and durable. This voltmeter is used for DC voltage measurement, such as 12V, 24V battery car, motorcycle and electric car. The battery voltage can be accurately measured and displayed to determine the residual battery capacity and prevent battery damage 0.56inch digital LED display, convenient to read data in the dark. For best accuracy, this voltmeter will automatically move the location of decimal point to the measured voltage. Specification: Material: Waterproof ABS Weight: 17g/0.6oz Measuring range: DC 2.5V -30V Minimum input: DC 2.5V Maximum input: DC 30V Measurement error: 1% Display mode: 0.56 inch LED digital display Display color: Red, Yellow, Green, Blue (Optional) Display voltage range: 2.5V - 30V Refresh rate: 200ms Waterproof: Yes Working temperature: -10℃~ 65℃ Shell color: black Size: 4.8*2.8*2.2cm/1.9*1.1*0.9inch Package List: 1* LED Digital Voltmeter 1* Cable Note: It is displayed as voltage, and the remaining battery quantity does not need to be judged according to the voltage value.