The speaker is advertised with two subwoofers and some reviewers write by an impressive sound for the size. I found the sound rather average for this size. Basse was in my opinion a weary knocking. Of the subwoofers I've heard at least. Of course you can not expect miracles in this size, but there is in my opinion even better sounding speakers with similar size, such as the Sound2Go Bass XL or the Jabra SoleMate mini (which I also think is not optimal).
Really annoying I found then the relative flashing at different distances and colors during operation Cabstone logo on the front. Here I found the brilliance of the size impressive.
Well, I find that the battery is replaceable. It is known from some Nokia phones battery with the label BLC-5, the can now buy more problems already for many years.
Due to the sound and the bright logos I sent the Lautspreher back.