Despite its small size this mini speaker delivers a very powerful and very good, although this is not the level of real speakers, but the sound is much that is returned in the treble or bass, the bass is good and full power no sizzle (tested on several types of music). Very small and accompanied by a small bag so as not to damage it by transporting it slips easily into any pocket and seems very resistant. Interestingly, it is possible to connect the speaker to another speaker of the same type or another or a headset, which lets you create a "perimeter strip" almost infinitely.
Small disadvantage against the cable used to recharge is too short which does not make things easy when you want to use and recharge simultaneously. The cable jack is also can be a little too short, it would have been that the cable is retractable as on some usb cable.