Mini Bike Alarm System: 46mm x 46mm compact anti-theft device that saves space. Made of PC and anti-UV material, IP54 waterproof and dustproof, resistant to high and low temperatures, suitable for outdoor use in all weather conditions. Easy-to-install wireless alarm system: includes brackets, cable ties, and double-sided tape for wiring-free installation on bicycles, motorcycles, scooters, tricycles, cars, and more. Wireless remote control bicycle alarm system: host features built-in lithium battery with USB-C charging and low battery indicator, eliminating the need for frequent battery replacements. Equipped with advanced energy-saving technology for extended battery life. Loud multi-function anti-theft alarm: automotive-grade 6-tone siren, 110 decibels output, effectively deters theft. Three alert modes available, remote control operation, one-button arming, and easy vehicle locating. Ultra-sensitive anti-theft detection: 3D displacement sensor with advanced algorithm accurately detects movement and reduces false alarms. 7-level sensitivity adjustment, triggers alarm instantly upon touch, tilt, vibration, or pressure. Suitable for bicycles and other applications such as doors. Color: Black Material: Plastic Package Contents: 1 x Bicycle Alarm 1 x Remote Control Note: Only the items listed are included. Light reflection and screen differences may cause slight color variation between image and actual item. Measurement error allowed within +/- 1-3 cm.