The Shelly BLU Door/Window ZB is a compact sensor for doors and windows that offers a reliable security solution. With its long battery life and fast response time when opening or closing doors and windows, it is ideal for use in smart homes. The sensor has an integrated lux sensor and a tilt sensor, which makes it particularly suitable for tilt and turn windows. The use of Bluetooth enables an instant response, while the integrated Zigbee technology enables seamless integration into various smart home platforms. To ensure functionality, a gateway is required, which can be provided by various Shelly devices. The Shelly BLU Door/Window ZB is therefore a versatile and effective solution for monitoring windows and doors.