SUPPORTS CHARITY - supports RAINN (the Rape, Abuse & Incest National Network, the nation's largest anti-sexual assault non-profit)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 and modern keychain attaches to backpack, purse or keys for convenient, instant access, plus greater value with batteries included (requires 4xLR41)SIMPLE TO USE & REUSABLE - pull metal chain from device to sound 120 dB alarm; push pin back in to stop sound and use againBROAD CONSUMER APPEAL - safe for children and a self-defense option for any age