This Yale Dummy Siren with flashing LED is ideal for creating the appearance of an alarm system and improving your home security. Simply fix to the outside wall of your property with the fixings provided. This Dummy Siren is NOT linked to an alarm system and only designed as a visual deterrent, it does NOT sound or trigger. The Dummy Siren is ideal for creating the appearance of an alarm system and improving your home security through replicating the visual deterrence of a live alarm, with flashing LED. This Dummy Siren contains all the fixings within the pack to attach to the outside of your home. This Dummy Siren can be placed anywhere, including outbuildings to prevent unwanted visitors breaking in your garage, shed or outhouse. 2x AA batteries (included) can last up to 3 years. IP X5 rated.