If someone tries to tamper with this lock while it’s on your bike, they’ll either be scared silly or they’ll be rendered temporarily deaf and dazed. The ear-piercing 100 decibel alarm will sound if the 1.5mm coated steel cable is cut or the lock itself is messed with, so you’ll definitely hear it even if you’re far, far away from your bike. It also has a movement sensor that can be switched on or off to sound the alarm if the lock is moved in any way. No keys to lose or misplace, it comes with a built-in program-yourself combination lock. Also comes with a laptop computer lock. Batteries included. 3.5"×2.5"×1", 3.5 oz. 2 ft×1.5mm Cable

Cable/Chain Comparison (w/ and w/out locks)