Anti-theft alarm: Once triggered, a loud 110dB alarm can be a great deterrent to thieves. It is suitable for doors, windows, bicycles, motorcycles and anything you want to protect. Wireless alarm system: Comes with a remote control. Press the first key to activate the alarm, press the second key to deactivate the alarm. Remote control distance up to 25m. DIY Installation: Comes with a double-sided sticker, just peel and stick to install the alarm anywhere. Powered by 2 AAA batteries (not included) Adjustable Sensitivities: With 10 levels of sensitivity, high to low matches touch, vibration and rhythm. You can set the appropriate level as your real need. Programmable and extendable: one alarm can be associated with several remote controls; A remote control can also be associated with several alarms.