The conclusion is that it's amazing! For a size two to three times less than my other speaker was a very well finished model, with easy handling and a friendly face.
The bluethooth like cable (not supplied ..) is entirely satisfactory and no problems were noted.
Regarding the sound: Report size / quality / super power!
It was a sound that lacks a little low frequency compared to a larger enclosure, necessarily, but it is surprising that some heat is present, and that the lower midrange are not ridiculous at all!
Midrange and treble are present, not muffled, even if they go up more easily in power when you push the volume and may become aggressive.
It has also not to be ashamed, since it is easy not to hear about 90% of max volume. In addition, saturation during peak tells us that we are at the end of its capabilities.
Honestly, for the price, it is well worth the ear shot!
I like to move the show to the office and the bathroom before going to the kitchen ...
Remains to be seen autonomy, announced as at 5am. A simple micro-usb cable supplied allows charging.