Oxford Alarm Chain10 10mm squareThe Alarm Chain 10 combines a 10mm square link chain with a loud 90dB alarm. This multi-purpose alarm chain lock will keep your bike and other valuable items secure from attack and the alarm will scare off any would-be thief.The Alarm Chain 10 has a key replacement service. When you buy your Alarm Chain 10, simply note down the number which comes either attached to the keys on a metal tag or is laser marked on each key.Key FeaturesLoud 90dB alarm sirenRobust hardened steel construction with a flexible cloth sleeve to protect paintwork2 year warrantyBatteries included (2 x CR2032 batteries)3 keys includedReplacement key serviceDimensions: 10mm square chain, 1.2m/1.5m/2.0m lengthSecurity devices cannot prevent all theft, but research shows that devices such as locks and chain used in combination with a cover are effective deterants.