Compact personal alarm with 140 Decibel siren helps call for assistance in an emergency and helps deter attacker. Audible up to 500' (150m) dependent on surrounding conditions. Quick and easy pull pin siren activation. Built-in LED light operates by pressing a button. Reusable by pushing pin back in to stop siren and use again. AG13 battery included that lasts up to 5 years. Valuable for all ages: Great to take with you when walking, traveling, working or living alone.