1. Car engine anti-theft device 2. Free installation of automatic induction replacement relay, installation is not easy to identify 3. No need to operate in automatic induction mode, you can switch between manual mode and anti-robbing mode 4. No damage to the car line, fast and convenient installation 5. After the flame is turned off, it automatically cut off the fuel, close to the vehicle and automatically open the oil path, the sensing distance is about 15 meters Anti-shielding and anti-interference technology, the chip is stable. Only suitable for 12V gasoline vehicles. Features: The working principle of the unit-relay: 1. Start the engine for the first time: the unit starts scanning the sensor ID password, which matches within 25 seconds, The car can be driven off successfully. If not successful, the fuel circuit be cut off after 25 seconds, and the engine stop. 2. Start the engine for the 2nd time: the unit shortens the scanning time to 20 seconds. 3. Start the engine for the 3rd time: the unit shortens the scanning time to 10 seconds. 4. Start the engine for the 4th time: Unit can not scan correct password that it was started illegally.No matter how many times it is started, the unit can sense the correct password before driving the car. 5. In the hidden-lock mode, the driving no longer scans the sensor ID,and the sensor needs to be sensed again after turning off. Remote control:Static current is about 0mA, Working current is 5mA. Battery specifications:CR2032 Unit-relay:working current is about 20mA Colour:Black Material:ABS Package Contents: 1 * Relay 2 * induction remote controls Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.