Description: 1. Press the “ lock ”button, the siren sounds once, then enter the anti-theft state in 5 seconds. If it is triggered by vibration, it will be sound for 5 seconds. If it is triggered in 3 seconds again, sounds for 30 seconds with 6 tones circulated. 2. Press the “unlock” button, the siren sounds twice, the unit disarm. 3.Car search function: Press “mute” or “bell” button, the siren sounds 30 seconds. Press any button to stop. No "mute" or "bell "button no functions. 4. Sensitivity adjustment: It has 7 levels, the 7th is the highest sensitivity, and the 1st is the lowest sensitivity. Default is the 4th. Specification: Working voltage: DC 12 ±3V Static current:10 mA Siren: 10A Working frequency: 433.92MHZ Remote control: Working voltage: DC 12V Average static current:0 mA Battery:6V CR2016*2 Learning code: Method 1: Press the learning code switch on the main unit inside, press any button on the remote, the siren will sound once, indicating that the learning code is successful, and the second remote learn code as first one. Method 2: Continuously touch the power/battery for 5 times. After the siren sounds, press any button on the remote, the siren sounds 3 times, the code is learned successfully. It can learn up to 2 remotes and the first remote automatically clears after the third remote was code learned. Package Includes: 1 Piece Main Control Unit 2 Pieces Remote Control 1 Piece English User Manual