SABRE Personal Self-Defense Safety Alarm on Key Ring with LOUD Dual Alarm Siren Heard up to 600 ft/185 meters Away. To Use, Pull Metal Chain from Base ATTENTION-GRABBING  120 dB dual siren alarm helps call for assistance in an emergency and helps deter attacker (audible up to 600 ft/185M 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 batteries included (requires 4xLR41) SIMPLE TO USE  pull metal chain from device to sound 120 dB alarm REUSABLE  push pin back in to stop sound and use again BROAD CONSUMER APPEAL  safe for children & a self-defense option for any age