Neat well but also strange ...

Once the unit regarding volume and battery is definitely recommended. Handy is also, albeit now in retrospect to travel a little bag would be a useful addition. For the price but that is probably more difficult.

Images of culurgiones can be found here. Here you can also see that the Speaker has a total capacity of 1000mAh.
https //fccid.net/document.php?id=2108110

Now to the devaluation:
The sound via Bluetooth from the iPhone is good
but via Bluetooth from DELL laptop not at all.
As the Speaker of the Dell sound much better. Also via headphones Dell is super.
Somewhere is because the worm in it. Per jack (3.5mm) I could not connect the speakers to the laptop because the cable is missing.
Since you can not adjust anything on the Bluetooth driver I am currently a little perplexed about the differences in quality. But if you look at the other reviews where people either praise or rip the part, then this could possibly be because streams from any source as the music.