This personal attack alarm is different from a security system as it is designed to be carried for personal safety. It helps a person who carries the alarm to draw attention or to frighten or startle an attacker. The alarm gets activated by use of a ripcord and can be switched off only by replacing the pin. When triggered, it emits a 130 dB siren that is audible at distances of up to half a mile. It also has a built-in strobe torch that flashes brightly. This alarm has a rugged outer casing and also comes with a wall-mount bracket.