This voltmeter ammeter has a handy connection and a wide application. For example, it can be applied to monitoring storage battery, DC adjustable power supply, or voltage and changing state of other device. Features - ColorAssorted Color - Size: 5.00X3.00X2.20cm/1.97X1.18X0.86in - Material: Plastic. -Note: The color of the cable is random. - Applications: Suitable for automotive/electric car/motorcycles battery monitoring or other products voltage measurement. - This voltmeter is 0.28 inch 3 digit high accuracy dual display, the display is bright and sharp. - When measuring , the measured line provides power supply. Don't need an isolated power supply. - High accuracy voltage measurement with measuring line voltage drop compensation. - A good tool to monitor charging LI-ion batteries and electronics bench, etc. Specification - Voltage measuring range: 0- . - measuring range: 0-10A. - Working voltage: DC 4-30V. - Voltage error: ±0.1%. - error: ±1%. - Refresh rate: About /time. - Working : <20mAh. - Operation temperature: -10 degree centigrade-65 degree centigrade. - Display color: . Package list: 1 x digital voltmeter