[Real-Time Voltage Display] With an accurate three-digit digital display, easy to read and clear even at night, the waterproof voltmeter is easy to read. Monitor battery and voltage in real time to know the battery status. [LED Touch Switch] digital voltmeter with touch switch, easy to operate, can switch between voltage and battery percentage , monitor the battery voltage in real time, can also turn off the voltmeter at any time, save energy and reduce battery consumption. [use safety] digital light-emitting diode voltmeter with reverse polarity, over-voltage, and short-circuit protection to easily monitor battery status and protect the circuit from wire burn. [Easy to Install] Easy to install battery voltmeter car, just connect the red line to the positive of the voltmeter, connect the black line to the negative, then fix it with screws. Made of high quality durable nylon, it is waterproof and durable. The input voltage is 12 - 24V DC. [Widely Used] LED car voltmeter is widely used and generally applicable to most vehicles, such as cars, motorcycles, cars, etc. boats, RVs, SUVs, trucks, ATVs, UTVs, etc. [size]36*15*29mm