The FRITZ!DECT 440 four-way switch is the ideal remote control for your Smart Home. It has a temperature sensor for managing the FRITZ! radiator controls and the central display means you can always see what's going on in your Smart Home.
> https://en.avm.de/products/smart-home/fritzdect-440/
Details Full control Operate your FRITZ! Smart Home devices at the touch of a button with the FRITZ!DECT 440 . Dim the FRITZ!DECT 500 LED light and switch the FRITZ! smart plugs on and off. DECT ULE – for an energy efficient home network The button is integrated into your home network via DECT ULE. The DECT ULE standard safely connects your FRITZ! Smart Home devices and helps you save energy....
> https://en.avm.de/products/smart-home/fritzdect-440/details/