Personal alarms are tiny devices that emit a powerful wave of sound. These units will accomplish many things at the same time. Primarily, they will alert anyone nearby of an emergency, which can bring aid and assistance quickly. Second, they deter any attacker as attention is being drawn to their act. Third, these devices are quite loud and will hurt attackers ears and disorient them in their acts. These devices can be carried in bags or on key rings and are easy to use when needed.