Functions: 1. Anti-theft: When the vehicle is not running, if the sensor card is not inside the vehicle, the vehicle will not start, thus achieving the purpose of anti-theft. 2. Anti-hijacking: After the vehicle starts, if the sensor card is not inside the vehicle, the vehicle will automatically shut off, thus achieving the purpose of anti-hijacking. 3. High sensitivity: The sensing detection range is 2-8 meters, the sensing distance is freely adjustable, with an audible alarm and an alarm response time of 0.1 seconds. 4. Low voltage alarm: When the battery voltage inside the sensor card is too low, a buzzer will sound an alarm after the vehicle starts. 5. Strong compatibility: Compatible with any 12V car, and can also be installed in vehicles that already have an anti-theft alarm installed. Specifications: Product Type: Car Anti-theft Device Material: ABS Alarm Method: Audible Alarm Power Supply Voltage: 12V/3V Rated Voltage: 12V Alarm Response Time: 0.1 seconds Battery Type: 2 Button Batteries (Included) Battery Model: CR 2032 Battery Capacity: 210mAh Compatible Vehicles: 12V Cars Product Features: 1. Compatible with any 12V car installation 2. Strong compatibility (can be installed on vehicles with existing anti-theft alarms) 3. Sensing detection range 2-8 meters 4. Adjustable sensing distance 5. Dual anti-theft and anti-robbery function options 6. Anti-theft function: When the system installed on the vehicle does not detect the card, if the door is forcibly pried open to start the vehicle, it will not start. This is the anti-theft function. 7. Anti-robbery function: If the card is removed and the vehicle leaves while it is in motion, the vehicle will automatically shut off after 1 minute. This is the anti-robbery function. 8. Emergency Release Mode (User-friendly system function selection: Car Wash Mode, Maintenance Mode) 9. Low Voltage Alarm Function (A buzzer alarm will sound after starting the vehicle when the internal battery voltage of the sensor card is too low) 10. Compact size, easy wiring and installation, and highly concealed. 11. Uses 2.4GHz frequency, resulting in less interference and lower power consumption. Package List: 1 x Anti-theft Device 2 x Remote Control 2 x Batteries 2 x Keychain 3 x Cable Ties 1 x Instruction Manual