Black, the speaker system is aesthetic. The nice touch (soft). When speaker system is on the periphery of the upper face is illuminated in blue look great.
The sound quality for the size of the speaker system and enough power for a medium-sized room. Of course no question of sound to a party!
The Bluetooth connection is done without difficulty (in my case a Samsung Galaxy tablet Tab3).
The battery is of the "Li-Ion" so no DEFFET memory. Reloading be done by means standard micro USB cable (supplied). Recognized autonomy: several hours as indicated in the description.
All necessary commands and signals are present on the upper side:
three keys which have 2 functions depending on whether supporting is long or short:
on / off, set volume, playback pause, previous track, next track.
A red light indicates the battery is charging. It goes out when finished. Lentourage switching on of blue is fixed when a Bluetooth connection is made, flashing when the speaker system is waiting for a connection.
Speaker system includes a wired input jack for the use with a device that would not have the Bluetooth (cable supplied).
And finally what does not hurt the price is contained.
One small regret the absence dune cover to protect it while traveling and store the USB charging cable and cord with jack.
Little more A website in French or lon can download the datasheet and manual of use "[...])".
Muse is a reputed brand in the field of HIFI who put his expertise to the design of the miniature model.
CONCLUSION:
Sound quality, aesthetic and functional. A purchase lon did.