This ABUS brake disc lock provides a very high security level with its 13 mm hardened steel bolt and the manipulation-proof ABUS XPlus cylinder. It locks the brake rotor and the integrated 3 D Position Control electronics sets off the alarm (100 db!) at the slightest change of position of the motorbike. A multi-colour LED and different acoustic signals inform about battery and activation status. All housed in a massive steel lock body. The alarm function is automatically activated once the lock is closed.