130 decibel alarm nearly equivalent to a jet plane and louder than a jackhammer or chainsaw The 'scream' alarm sound is designed to shock and disorientate your attacker, giving you precious seconds to get away Can be attached to a key ring or bag Alarm is activated by pulling the chain sharply Dimensions H7.7 x W3.7 x D2.2cm Comes in 3 colours designs This alarm can be used more than once and has 10 minutes' battery time in total. Please note the battery cannot be replaced and continual short use will shorten its life This product is not available for international delivery. Find out more MS is a member of the WEEE Distributor Take Back Scheme. Recycling your electronic waste has never been easier! Click here for more information Can't select your size Click here for help if you are having trouble adding an item to your basket