Simple Rip-cord operated personal alarm which emits an earpiercing�140+dB siren. Audible up to 1/2 mile / 800 metres Tough outer casing made from ABS plastic (riot shield material) Supplied with 9 volt battery giving in excess of 2 hours continuous running. ��(Battery supplied and fitted). Independent torch function which�also acts as a STROBE LIGHT�when the alarm is activated Supplied with wall mounting bracket and belt security clip. Can be fitted to a Wheelchair as wel The Belt Clip Alarm is particularly suitable for : Night Owls Lone Workers Joggers Dog Walkers Ramblers and Hill Walkers People who may need medical attention Nurses WARNING : Professional Personal Alarm with strobe light/torch facility. Do not confuse this with imitations, this is the loudest and most ear piercing siren available today so Be Warned!�