Electronic brake disc lock with a 13mm special hardened bolt. Bolt. lock body and supporting elements of the lockingmechanism are made of special hardened steel. Alarm function on basis of the 3D detection system which means. that every movement is detected. Alarm of at least 100dB. Lock can be transported in locked condition without activateddetection system. thanks to automatic brake disc recognition. system. A multi-colored L.E.D. and different acoustic signals inform about battery. activation and alarm status. X-Plus cylinder for highest protection againstmanipulations. e.g. picking. Manual keyhole cover protects against dirt and corrosion. 2 keys are included. 1 L.E.D. lighted. Includes 2 AAA standard batteries.