Automatic Car Security Alarm System 12V 2.4G Remote Start Engine Detection for Vehicles Features： 1、Induction Detection: Automatic induction detection range is about 1‑10 meters, the induction distance can be freely adjusted 1‑8 gears, when the vehicle does not detect the induction card, pry open the door can not start the car. 2、Antitheft Function: When the vehicle is moving, the vehicle does not detect the induction, the vehicle will automatically turn off the engine, to achieve the purpose of anti hijacking. 3、Alarm Alerts: The remote sensor has a low voltage alarm prompt function, when the internal battery voltage of the sensor card is too low, it will beep the alarm prompt after starting the vehicle. 4、Strong Compatibility: This car alarm system is suitable for most 12V cars and can be installed in vehicles that have been equipped with an anti theft alarm. 5、Application: Emergency release mode used for car washing, vehicle repair, or sensor remote control damage, sensitive and practical. Specification： Item Type: Car Security Anti Theft Alarm System Material: ABS cr2032 Button Battery Capacity: 200mAhx2 (shipped with matching battery) Automatic Sensing Range: 1-10 meters Applicable Model: 12V vehicle general purpose Package List： 1 x ECU Control Box 1 x One Touch Start Button 2 x Intelligent Sensor Remote Controls 1 x Start Wire Resistance 1 x Auxiliary Line and Learning Code Switch 2 x Button Cells 2 x Keychains 2 x Ties 1 x User Manual