The Oxford Screamer 7 is an attack activated disc lock alarm.Tough and durable disc lock with motion and shock sensorsLoud 100dB alarm sirenPowered by a lithium CR2 long life batterySimple push to lock featureWater resistant keyway cover7mm Diameter locking pin fits many disc brakesHeight 65mm X Width 99mmAvailable in two colours black and yellowThe Oxford Screamer 7 Alarm Disc Lock is a tough and durable Disc Lock which has motion and shock sensors to deter thieves. If these sensors were to be triggered, a loud 100dB alarm siren will go off. This siren is powered by a lithium CR2 long life battery.This Lock has a simple push to lock features, and there is a water resistant keyway cover. There is a 7mm Diameter locking pin fits many disc brakes, and is approx. height 65mm X width 99mm.The Screamer 7 has a 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 pla