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.Increase sensitivity:Press the lockunlock button for 3 seconds at the same time.If the siren sounds 4 times, it means that is the 4th gear.Press lock button once, the sensitivity increases one gear, that is the 5th gear, the siren sounds 5 sounds.By analogy, If the siren sounds 7 times, the sensitivity is 7th gear. (Caution the 7th is high and easy to report falsely).After confirming the required gear, do not operate the button for 5 seconds or press lockunlock button for 3 seconds at the same time, and the siren will sound 3 times to exit the sensitivity adjustment mode.Specification:Main unit:Working voltage: DC 12 3VStatic current: 10 mASiren: 10AWorking frequency: 433.92MHZRemote control:Working voltage: DC 12VAverage static current: 0 mAMaterial:ABScolour:Black + SilverPackage Contents:1 x Main Control Unit2 x Remote ControlOnly the above package content, other products are not included.Note: Light shooting 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.