High accuracy: digital voltmeter measuring range is DC 3-30V, its decimal point will automatically move, and it also has a tiny potentiometer to do finer adjustments. Safe to use: our volt detector is designed with reversed connection protection, it will NOT be burnt even when connected reversely, but the screen display . : the voltage mintoring meter is designed with bright LED display, and it is well Made, the strong plastic case prevents it from easily damaged by outer force. Application: It is perfect to monitor the condition of the battery, especially for solar projects, you can use it on your car, trailer, motor, etc. Please don't use this meter in 24V battery because when the battery is full-, its voltage will be about 30V. light color: blue light colour: black Material: plastic Package Contents: 1 x Voltmeter Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.