Abus 440A Alarm U-Lock Description: The Abus 440A Alarm U-Lock not only offers security from the high quality construction and rugged design, but it also has a built in alarm. If a thief tampers with your bike, the 3D Position Detection System will sound a 100-decibel alarm even if the slightest movement is detected. Leaving the bike securely locked in place and the thief running. Features: Hardened steel construction 100 decibel alarm will sound for 15 seconds if movement is detected, then an automatic reset High-quality locking cylinder offers protection from lock picking Integrated mount securely attaches lock to the bike frame Specifications: Lock Style: Keyed Diameter: 12mm Dimensions: 9 x 4.1" Weight: 3.3 lbs Includes: (1) U-Lock (2) Keys CR2 Batteries Integrated mount