The Shelly Smart Security Bundle is a complete set of Bluetooth devices that provides additional protection for your home. The bundle includes three Shelly BLU motion sensors, three Shelly BLU door/window sensors, and one Shelly BLU gateway. With this solution, you can monitor your home by receiving instant notifications, no matter where you are. All sensors are automatically added to your Shelly Smart Control account when you connect the Shelly BLU gateway.