SimpleHome XHS7-1003-WHT Wi-Fi Smart Door & Window Sensor, White Magnetic sensor alerts you when a window or door is opened Get notified when door or window is opened with push notifications Can create actions with other Simple Home products to turn on when magnets get separated Base plugs into any standard wall plug and communicates with sensors up to 10 feet away Installs in seconds- stick sensors onto surface with double sided tape (included) Sensors battery last up to one year depending on usage All of your products controlled by the Simple Home App