Features: Mini disc brake lock, compact and easy to carry. Simple and convenient operation. Click the lock cylinder, it will be locked. Support warning alert function. There will be alarm sounds if the lock is shocked by someone. Gently press the lock for head to lock it, which is convenient and quick. It is suitable for all kinds of vehicles with disc brakes, such as motorcycles, electric vehicles, bicycles, mountain bikes, etc. The for shell is wrapped with high-quality material, which will not deform at high temperature and will not crack at low temperature. It works by locking the disc brake. Anti-prying and anti-drilling lock core, good safety. Specifications: Material:Aluminum Alloy Size:Approx.8.5x7.5x3.2cm/3.34x2.95x1.25inches Color:Black/Red/Blue/Yellow/Gray Note: Press the for key cylinder to lock with a "beep" sound, it puts on alert in 10 seconds accompany with a vibration and three "beep" sound. If the lock is shaked, another shake after 5 seconds will cause alarm, and hereafter continuous vibration can bring continuous alarm. No shake occurs within 10 seconds after the alarm, it will be on alert again. 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1x Motorcycle Disk Brake Lock(Not include battery) 2x Keys 1x Screwdriver