For monitoring and transmitting the current window handle position (window open, closed, tilted). The status can be visualized on the free@home panel and in the free@home app. The window detector is mounted between the existing window handle and the window frame. The existing window handle is still used. Suitable for window handle: 7 mm square, 43 mm fastening screw spacing, cam diameter 10 and 12 mm, max. size of the fastening plate of 34 x 77 mm (W x H). No cable laying necessary. Accessories for mounting (square extension, screws, adapter for cams) of the window detector included in delivery. Battery included in delivery. Battery type: CR2 Notification when the battery is low in the free@home app. Programming via the web interface of the system access point. Further information on commissioning and operation can be found in the system manual and the online operating manual.