Overview: This item is BT Chain Smart Lock, it has anti cutting, anti disassembling,removing alarm and vibration alarm functions. You can lock and unlock your bike or motorcycle with your phone APP. So, don't hesitate, it will be a good choice for you. Features: *Powerful anti-theft smart cable lock,has the functions of anti cutting, anti disassembling removing alarm and vibration alarm *IP44 waterproof grade, can use both indoors and outdoors *Alarm sound up to 110dB, effectively frighten the thefts *ABS plastic+copper+cable(chain), strong anti-theft high quality material *Easy control with APP, you can lock and unlock your bike or motorcycle with your phone (Android 4.3,iPhone4s above systems and BT 4.0 version) Specifications: Material: ABS plastic+copper+cable(chain） Power: 3 *AAA alkaline batteries(not included) Cable(Chain) length: Approach. 80cm Color: Black Working temperature: -10℃