This is a Portable security device, the disc lock discourages theft by blocking the vehicle from being moved in a forward or backwards motion. The Lock uses the holes in the motorcycles disc brakes by passing a locking pin to the other side. Shock and movement sensors will trigger the alarm which emits a 110-120 Db frequency. -With Built in alarm -Heavy Duty, Zinc Plated Stainless Steel lock -Quickly disarmed using one of the two keys included -Weatherproof and anti-corrosion -Battery powered (6 x AG13 Button cell Batteries included) -Approximate size 9x7x3.5cm