A multicolored LED and different acoustic signals update battery, activation and alarm status. One-hand operation due to the patented Snap n' Go system; lock closes and activates automatically when pressed into brake disc. ABUS Extra Class cylinder with encoded reversible key. Bolt, lock body and supporting elements of the locking mechanism are made of special hardened steel. Alarm function on basis of the ABUS 3D detection system, which means that every movement is detected. Lock can be transported in locked condition without activating detection system, thanks to the manual activation button, integrated into the Snap n' Go mechanism.