By TaoTronics Bluetooth speaker I've finally found the perfect solution for it. The small speaker comes well packed with recharger and instruction manual. His appearance seems to high. The surface is rubberized.
According to the description of the speakers is splash-proof, but should not be taken on dives. The charge jack is hidden behind a rubber cover, so that should penetrate in this "vulnerability" no water.
On the front are buttons for switching, pause / play, volume up / down, down / up. All the buttons are easy to reach and also blind to use.
On the back there is a suction cup, with which I could fix the loudspeaker well on the tiles in the shower stall.
The connection via Bluetooth is very easy. Switching, connect, play Mukke.
The sound quality is quite good for such a small Brüllwürfel, in any case, better than the big radio outside the shower. In particular, I have come to appreciate that I can go in the shower and the title can change the volume.
I can not say anything more precise, only so much that I already had several shower sessions with the part about the battery life.
Conclusion: Very good, water-proof Bluetooth speaker to narrow price!