SABRE Personal Self-Defense Safety Alarm on Key Ring with LOUD Dual Alarm Siren Heard up to 500 ft/150 meters Away. To Use, Pull Metal Chain from Base ATTENTION-GRABBING  110 dB alarm helps call for assistance in an emergency and helps deter attacker (audible up to 500 feet/150M away) VERSATILE AND USER-FRIENDLY  this sleek, compact modern design keychain attaches to backpack, purse or keys for convenient, instant access, plus greater value with built-in LED light and batteries included (requires 3xLR44) SIMPLE TO USE  pull metal chain from device to sound 110 dB alarm REUSABLE  push pin back in to stop sound and use again BROAD CONSUMER APPEAL  safe for children and a self-defense option for any age