NWT Birdie Personal Safety Alarm Whistle for Women Keychain in Coral Brand new, unopened and never used Meet the personal safety alarm made for women, by women. This colorful alarm has a loud alarm and flashing strobe light designed to deter an attack. THE DETAILS- LOUD siren and flashing strobe-light Solid brass keychain Alarm dimensions 3.5 in. x 1.125 in. x 0.5 in.