Security - WiFi Indoor Siren (5V DC Powered) - 1 Pack Complete Peace of Mind - Always know what’s happening & deter intruders once this loud add-on siren is triggered by Swann Wi-Fi Alert Sensors (sold separately). Scare Off Intruders - Once paired together, Swann’s Wi-Fi Alert Sensors trigger the Siren with audible options for a voice to say, “Sensor triggered”, sound a ‘ding dong’ or ‘beep beep’, or a traditional siren sound (up to 80 decibels). Visual Alerts - Siren can light up for a visual alert with or without sound. Control it all in the app. Perfect for Renters - Do-it-yourself with ease. The Siren mounts easily on walls or place it on flat surfaces. Ideal for apartments & rental properties. Build Your Own Security - Connect on the Swann Security app & combine with Swann security cameras which can be programmed to trigger the Siren to build a complete security solution for your home. Depth: 100 MM Easy Install - Connect in minutes Auto Tiggers - Sensors detect activity No Hub Required - Easier setup Indoors Only - Deter intruders Wireless - Easy 2.4GHz Wi-Fi operation Smartphone Control - Control using the app Powered Wi-Fi - Plug & play Height: 60 MM Width: 100 MM