Personal alarms are electronic devices that emit an extremely loud siren-like sound. You activate the personal alarm when attacked by an assailant or when the threat of an attack seems likely. The loud sound draws much needed attention to your situation and increases the risk of getting caught to the assailant. The assailant would not like drawing attention to himself and will likely find an easier target. Although personal alarms can not actually disable an attacker, if used in conjuction with a stun gun or pepper spray, you will greatly increase your chances for escape.
These small, convenient personal alarms will not take up much space. Lightweight and extremely loud, they give you the attention drawing capability you need when it matters most. Carry a personal alarm with you wherever you go and use it to draw attention in any crisis.