GE Personal Security Kit, Keychain/Doorstop/Window or Door Alarm, 120dB Siren, Easy to Use, No Wiring, Perfect for Home, Apartment, Dorm and Travel, 45216 Three individual alarms provide security in your home, apartment, dorm or on-the-go 120-decibel alarms deter would-be intruders and provides peace of mind Door stop alarm sounds 120dB siren when alarm is activated, pressure on doorstop activates alarm Window or door alarm sounds when window or door is opened, features an easy access off/chime alarm switch and low battery test button Keychain alarm sounds when pin is removed, features a built-in guide light and low battery indicator