Product weight: 27+10g Product size: 7.1x4x3cm Product color: black Product material: ABS, PC, electronic board describe: 1. The design is compact and easy to use. Insert the socket of the car cigarette lighter to measure the voltage value of the car battery. 2. High-brightness red LED three-digit digital display, easy to watch. 3. Monitor the battery voltage so that the battery can be used under normal working voltage to extend and protect the service life of the battery and the engine. 4. Built-in overload and overcurrent protection, if the voltage is higher than 14.5V or even more than 15V, the generator must be broken, and the voltage can no longer be automatically adjusted, so quickly turn off the flame. Package: 1*1pcs voltage measuring instrument