First, for those who have a negative comment on the compatibility with the German made, I confirm that it is not possible to connect it to a French grounded outlet. However it is easy to adapt the device simply to plug without adapter: just make a hole in the ground symbol with a 4mm diameter drill. There is nothing behind, no electric son. Go there without ulterior motives.
For the rest, the device works perfectly as indicated in the description. Its large screen makes reading.