How to install the Gigaset thermostat?
Remove the battery cover and insert the batteries into the thermostat. Add the thermostat in your Gigaset App and follow the instructions. Connect the thermostat to your base station and keep a maximum distance of 1 meter between the base and the sensor. Then press the pairing button on the base until the middle boost button on the thermostat flashes green. During the pairing process, no button has to be pressed on the thermostat itself.
After connecting, replace the thermostat with your regular heating controller on your radiator. For this you may need suitable tools (e.g. pipe wrench) or a screwdriver. Then press the Boost button on your thermostat as described in the app.