【USB RECHARGEABLE NO NEED REPLACE BATTERIES】The bicycle alarm is powered by a built-in rechargeable 4.2V 700mAh lithium battery which can be charged by your DC5V power adapter and the package included USB-C charging cable, so no need replace the battery and save money. The bike alarm uses 4th version power-saving technology, a full charge can work about 1~3 months (depend on the alarm frequency) 【3 INSTALLATION METHODS SUITABLE FOR MORE PURPOSE】Come with mounting bracket, cable ties and double-sided tape for 3 installation methods. Bracket installation is more convenient to change the installation position. Zip ties and double-sided tape installation suitable for irregular mounting objects. Easy to install and use. A must have anti theft alarm for bicycles or electric bikes or scooters motorcycles owner 【ADJUSTABLE VOLUME & ADJUSTBALE SENSITIVITY】Up to 110dB LOUD alarm, scare off potential thieves effectively and give you good peace of mind. Well-made bike alarm with great performance. 3 levels adjustable volume, don’t worry about the alarm is extremely loud or not loud. 7 levels adjustable sensitivity from gently touch to push or beat, easy to set it as your need 【REMOTE CONTROL】Wireless control by remote, updated remote with strong wireless range up to 164~229ft. Vehicle search function, easy to find your vehicles in parking lot, 3 kinds of bells for your choice. IP54 waterproof, suitable for outdoor use 【MULTI-PURPOSE ALARM】Vibration triggered alarm, incredibly useful antitheft products suitable for Bikes, Electric Bike, Motorcycle, Moped, Scooter, Car, Trailer, Luggage, Door and Window...More features: Charging level indicator / Low battery indicator / Long battery life / Can add more alarms and remotes