This handy alarm protects your bike from thieves. The device has an 85 decibel alarm and a Find Your Bike feature that works with Apple's Find My app. Once the device is activated, moving the bike triggers the alarm and notifies the owner of the movement. Works with the Knog Android application. An 85 decibel alarm that is triggered by movement. Attaches to the screw holes on the water bottle holder Attach the anti-theft device with screws Turn on via Bluetooth connection (must be within approx. 1.5 range) LED light indicates device status and battery charge Battery life 2-6 months Rechargeable with USB-C cable (not included) Low battery notification when battery charge is below 20% IP66 waterproof, washable