Artago 32S Motorcycle / Bike Alarm Disc Lock 15mm 15 mm piston diameter with S.A.A. Lock System: inox steel and exclusive locking mechanism High-Tech Alarm sensor (0 false Alarm) / IndependentElectronic System - can use with or without alarm with Smart led arming sensor. TripleSecurityFunction: Maximum level homologated Lock / Alarm / Warning. The most Heavy Duty alarm Disc Lock / Supplied with quality pouch, 2+1 reversible keys with code copy service , extra battery set AAA , Allen key and reminder cable. Top security level and quality / Water proof / Two years warranty