Package Contents: 1 x Brake Disc Alarm Lock (battery included), 2 x Keys, 1 x Hex Key, 1 x 1.5m Alert Cable, 1 x Uchoose Storage Lock Bag. Scope of application: Suitable for most motorcycles, bicycles, scooters, Cruisers, Choppers with disc brakes?For brake discs less than 7mm (1/4") thick and cross-drilled,It is an excellent anti-theft device, the best gift for friends or family. How to use: Press the lock body to lock with one button, and it is very easy to put the disc brake lock into the alarm mode. When you hear a "beep", it officially enters the alarm mode. When vibration or motion is detected, the motorcycle alarm will sound 110dB continuous screaming alarm lasting about 10 seconds for anyone to notice. If you want to turn off the alarm sound, you have to unlock it or wait 30 seconds. Material: High-strength aluminum alloy is used, which is durable. The sturdy lock body ensures the anti-theft function and safety, and has the functions of waterproof, dustproof and high temperature resistance, which is suitable for various outdoor environments. :The disc brake anti-theft lock with alarm function, with a vibration sensor inside, can feel the vibration, can protect your motorcycle and bicycle from theft, 110dB high decibel alarm sound can be heard around, ensure that your motorcycle or Bicycles can be parked safely outdoors and on the side of the road.