Know when someone enters your home with the Geeni smart door/window sensor. It connects to your Wi-Fi network to instantly send alerts to your smartphone once it detects that a cabinet or an entry point it's attached to is opened. Install this Geeni smart door/window sensor on almost any surface with the included screws or adhesive. Wireless design offers flexible placement options. No hub required, Wi-Fi built-in. compatible with all 2.4 GHz Wi-Fi networks. Not compatible with 5GHz networks. 2 Pack for added convenience to protect any room in your home.