I confirm that the sound is awful (like worse than the sound that would come out of a smartphone), but as it is in the shower I do not care a bit.
I confirm that FM reception is very poor. So I turned on the radio and found that the antenna inside is 20cm to break everything. I soldered a wire of 1.5 m instead and made a hole in the bottom of the radio to advance the line and now the reception is nickel).