Buwico&reg; Wireless Remote Control Bike Bicycle Alarm Siren Shock Vibration Sensor Cycling Lock Guard Burglar Alarm Alarm: powered by 1x 6F22 9V battery (not included). Remote controller: powered by 1x L828 battery(included). To Setup Alarm: Hold the "A" button on the remote until you hear a "beep" sound. To Trigger Alarm: Slight movement or impact on the bicycle will trigger the alarm. To Remove Alarm: Hold the "B" button on the remote until you hear a "beep" sound.