This product is Bluetooth chain intelligent lock, with anti-cutting, anti-disassembly, disassembly alarm, vibration alarm and other functions. You can lock or unlock your bicycle or motorcycle with a mobile phone application. Features: Strong and durable: made of ABS plastic + steel wire rope, strong anti-theft performance, high quality material. Anti-shearing function: Always give an alarm when cutting the steel rope. Anti-disassembly function: Always give an alarm when the screw is disassembled. Vibration function: alarm for 30 seconds when shaking or moving the lock. Waterproof function: IP44 certification, can withstand all kinds of environmental tests. Alarm voice: more than 110 decibels, effective deterrent thieves, remind the owner. APP Bluetooth control: APP is easy to control and can lock or unlock bicycles or motorcycles through mobile APP (support for Android 4.3, for compatible with iPhone 4S or above, for Bluetooth 4.0 version). Spezifikations: Material: ABS Plastic + Copper + Steel Cable Power supply: 3pcs AAA batteries Length: 80cm Operating temperature: - 10 ~60℃ Storage temperature: - 20 ~80 ℃ Size: 9.2*5.5*3.4cm/3.6*2.1*1.3in Package Weight: 301g/10.6oz Package List: 1 * Bluetooth Lock 1 * Installation Kit APP Bluetooth control: APP is easy to control and can lock or unlock bicycles or motorcycles through mobile APP (support for Android 4.3, for compatible with iPhone 4S or above, for Bluetooth 4.0 version). Alarm voice: more than 110 decibels, effective deterrent thieves, remind the owner. Waterproof function: IP44 certification, can withstand all kinds of environmental tests. Vibration function: alarm for 30 seconds when shaking or moving the lock. Strong and durable: made of ABS plastic + steel wire rope, strong anti-theft performance, high quality material.