Since I did not have the faintest idea what my own old thermostats for threaded versions or brands, I am on the lapidary "fits on most commercially available radiators" left in the product description .....
What was not a mistake ..... even with the included adapter, the installation was no problem ..... my only problem was, you lower the old Gelumpe from the heater. :-(
But, then it has nothing to do with this here ......
Who the product video look at Amazon for installation here, will have no problems to mount the part.
The programming was a little awkward for me ..... which, "who can read is a clear advantage" ;-)
Note must be that you have to "program" all day ...... the end of the first switching time is automatically the start of the next switching time ...... and therefore must, if one starts at 6 clock eg on arriving late again at 6 clock .... is naturally in the guidance ...... but who reads because even sooooooooo carefully ;-)
All in all, the Tein assembled and programmed in half an hour ....... great thing.
And also works perfectly ..... eg no more trouble with turned up heating and the windows open ..... :-))
For questions I am of course happy to help.