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 iPhone 4S or above, for Bluetooth 4.0 version). Specifications:Material: ABS Plastic + Copper + Steel CablePower supply: 3pcs AAA batteriesLength: 80cmOperating temperature: - 10 ~60Storage temperature: - 20 ~80Size: 9.2*5.5*3.4cm/3.6*2.1*1.3inPackage Weight: 301g/10.6ozPackage List:1 * Bluetooth Lock1 * Installation Kit