Radio window handle sensor 120x35x7mm, with battery (lifespan 7 years). Installation behind a conventional window handle. Radio transmission telegrams for the window positions open, tilted and closed. Status telegram every 15 minutes. Very easy to install under a standard window handle: unscrew the handle, put on the sensor, screw on the handle. In some cases, the use of the FFG7B- means that the square pin of the window handle is too short and can be extended by using the pin extension accessory SV7x7x14.