Mobile Bluetooth speaker - TREK PARTY - model (IPX5) sealed to the outside - portable wireless stereo speaker equipped with a powerful battery to charge your devices - SOUND DICE ® (Electronics)
I tested this speaker, the sound is quite good and reasonable autonomy. The design is not my style, she has nothing more than a non-pregnant "unbreakable". To try it, I did it fall by 1m, the volume knob broke. It is not really waterproof either