, I have no problems using the track buttons to control playback from my cell or BT media players, it pumps out some big sound, and it even has a user-replaceable battery (that's reasonably priced from the manufacturer).

And something I found surprising is it's rechargeable battery is self replaceable

niceYou can can also use that to update the firmware - and the battery is replaceable - which is a plusYou also cant stand these on these vertically like the small ones - so they take up a ton of space when you need to charge them - and the chargers block the other outlets on many power strips

The audio quality is great and both speakers have fantastic battery life

I will say I love that it has a good battery life and that I can charge and play it at the same time

It is a great product, the battery last several hours and it is easy to set up and use