Attach the FRITZ!DECT 350 to doors or windows and it immediately detects whether they're open or closed. Simple registration, setup and control, DECT-ULE sensor customised for FRITZ!Box with DECT, Perfect for use with the FRITZ!DECT 301 and 302 radiator controls, Controlled via FRITZ! smart home and compatible Zigbee devices, FRITZ!App, FRITZ!Fon and FRITZ!OS display the status. Includes: 1 x FRITZ!DECT 350 (consisting of sensor and magnet) 1 x Quick start guide 2 x AAA batteries 1 x Adhesive strip 1 x Pin tool for resetting