Xena (XZZ6L-SS Disc-Lock Alarm, Stainless Steel Lock features push-down locking system, 6mm hardened-steel locking pin, freeze-spray resistant body and key barrel Alarm features 120dB alarm, auto arm/disarm, shock and movement sensors Weight is 418g; CR2 Lithium Batteries It includes 1 XENA disc-lock, 1 CR2 Lithium battery, 2 Keys, 1 XENA lock tool laser-etched with key code and 1 Allen key