Goes quickly indispensable!

Being originally looking for a compact chain or device to CD + USB or SD card around 200, I tried two items in the category quickly abandoned / sent, because of his unacceptable.
I finally turn to this article, more expensive, but with the advantage of compactness and portability.
The most common is listening via mobile phone or other Bluetooth device. The mini-jack is less useful, but allows to connect to a headphone output (but with a fairly low end noise, linked to the impedance).

I still have it and takes almost-everywhere:

+ Light, compact, can be followed anywhere, including outdoors
+ The very good quality, very good cutting frequencies,
+ Impressive volume, enough for a very large room (but not for "dancing" evening!), Or a large outdoor terrace
+ Autonomy actually much greater than 10h in use "normal"
+ Very simple operation, Bluetooth together in seconds
+ Very high quality manufacturing

- No sound adjustment except volume
- Fairly low mids in volume (Bose)
- Usb plug would still be convenient for playback from key

... For the look, matter of taste! ..