That the microphone should have worked, we learned later, it worked well for us as described here by many from the very beginning not.
The production line has always been very slow and gave about four months his mind completely on, it's just decoration. Then the screen began increasingly to spin and so many a night we had the cash out of the room to remove because they were suddenly strange humming noises. Here always helped the take out and re-inserting the batteries (which were not empty, then we went back for a while well until the next disturbance). Meanwhile, the display also based on fresh batteries only cryptic characters and also the so beloved by Sohnemann beep when typing and scanning works only sporadically. The neighbor's son once again managed to jam the supplied EC-card into the cash drawer that this did not go on. It was very difficult to get the card back out, even with solving all screws, as the tray is a separate block that does not affect the screwing.
Overall, I found the till though the idea and the layout, the nice, but the implementation hapert extreme. Bad processed and not really durable even with careful treatment. We will buy us next to another model and hope to have it longer pleasure. My conclusion: do not buy.