I first ordered the Omron DOR2, I returned after 2 days the prompts did not seem to correspond to reality. The RS6 model has the advantage of giving an indication of the correct position of the arm and the cuff. But the measures still seem as fanciful, the voltage taken three successive times from about three measurements, to go from 16 to 14 for example. Regarding the instructions in German, no problem, download the French on the Omron website.