When you are in the range of 5 meters form the vehicle , the anti-theft system will automatically liftedWhen you are out the range of 5 meters from the vehicle ,the anti-theft automatically turn into the anti-theft state.(Note:in the presence of electromagnetic interference , pke sensor function may be invalid , this time,press the remote control to unlock)Feature:PKE Function: Two way anti-theft AlarmCutting Line FunctionMotion sensor alarmSecurity alert, 24 hours real-time alertKeep your motorbike away from everyday thievesWeatherproof,cutting edge alarm,powerful hornRemote sensing remind distance: <300MEngine Start Funtion/Remote start/stopAutomatical rearm, prevent false disarmSpecification:Color: As PictureThe alarm horn sound size: 105-125 DBRemote control frequency: 315.5 or 433MHZWorking voltage: 12 3VThe host shell: waterproof design, beautiful appearance, sleek.Package Included:1x Motorcycle alarm host machine2x 2 way remote control (batteries not included)1x Alarm horn1x Adhesive pad1x usage InstructionNoticeThe difference lies in the different styles of the keys, but their functions are all the same