1、APP Bluetooth control: APP is easy to control and can lock or unlock bicycles or motorcycles through mobile APP (support for Android 3, for iPhone 4S or above, for Bluetooth 0 version). 2、Alarm voice: more than 110 decibels, effective deterrent thieves, remind the owner. 3、Waterproof function: IP44 certification, can withstand all kinds of environmental tests. 4、Vibration function: alarm for 30 seconds when shaking or moving the lock. 5、Strong and durable: made of ABS plastic + steel wire rope, strong anti-theft performance, high quality material. 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 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