Heatit Z-TRM2fx fits in a standard standard thermostat outlet (Elko RS16, Schneider Exxact, Gira, Jung and others) and replaces your old thermostat to the floor heating. The thermostat communicates via Z-wave with your hub and can thus be controlled over the network and communicate with other devices connected to your hub.
The thermostat can be connected to your existing sensor in the floor, also included with new sensors in the package. If you can't use sensors in the floor, the thermostat must be supplemented with a room sensor.
By connecting your hub with a Heatit thermostat connected to Tibber, you can set the desired temperature both physically on the thermostat or via the Tibber app. Through the connection to Tibber, you can also control your heat smarter by steering towards the electricity price's up and networking.