1Universal Application: Car anti theft system is suitable for 24V system vehicles, can be installed in vehicles with anti theft alarm. 2Long Detection Range: The inductive detection range is about 2?8m / 6.56?26.25ft, the sensing distance can be adjusted freely. 3Anti Theft Function: When the sensor card is not detected on the vehicle, the vehicle cannot be started after the door is pried open. 4Anti Robbery Function: When the vehicle is driving and no sensing is detected, the vehicle will automatically shut down and cannot be started again. 5Low Voltage Alarm Prompt: When the internal battery voltage of the inductive card is too low, the buzzer alarm (not included) prompt will sound after starting the vehicle.