Description can be misunderstood. Dokumetation only limited use.

I wanted to use the room thermostat as a replacement of a defective mechanical room thermostats. From the description was not sufficiently clear that the output is not potential-free and can be switched. Since this was but absolutely with my heating necessary, I had to additionally switch between a relay. A clearer product description would be helpful here.
It comes bundled documentation in German and English. Since the translation but was not complete, I had to consult the English version. Both documentaries describe the functions, however, very scarce and incomplete, so you have to experiment.
Once you've made the setting, the thermostat works look good. The processing and the price are right. My decision to award only 3 stars only based on the quantified description and lack of documentation.