The Oxford Boss Alarm Disc Lock is their strongest ever disc lock, and has the advantage of being a disc lock and alarm in one!5 Year life-cycle tested (by Thatcham)Removable, sealed unit alarm moduleWater, vibration, frost and heat-proofBatteries Included (6 x LR44)Free Minder CableThree keys and Key replacement serviceCan be used as a disc lock or padlock100db alarmAlso available with 14mm shackleThe Oxford Boss Alarm Disc Lock has a removable, sealed unit alarm module and is water, vibration, frost and heat resistant. It is supplied with a free disc lock reminder cable.For additional peace of mind the Boss Alarm Disc Lock is eligible for Oxford's key replacement service so that if you are unfortunate enough to lose all your keys a new one can be made up. Just remember to take note of your key number and keep this in a safe place.