Smart Wifi Alarm Siren sounds and flashes lights brightly when devices are triggered in your home. Works with other Simple Home products like motion, door and window sensors. Smart siren alarm sounds off and flashes brightly when sensors are triggered; Create actions that communicate with other Simple Home products; Delivers a loud piercing 100dB alarm sound; Red flashing strobe light for safety and security; Works with Simple Home motion, door & window, and water sensors; No installation required, just plug it in; No hub required, works off your existing wifi network.