This product is mainly protected by the battery function The battery function switch is a management electronic switch and Hu control system. It uses a super flashlight to supply power through the booster circuit. It does not need to link the battery power supply. It is installed at the vehicle dashboard with emergency start buttons and work indicators. When the driver opens the door and enters the cab, please press the control switch button to control the electronic switch to work, turn on the vehicle power, and automatically enter the vehicle working state.