The bem wireless mobile speaker let s you hear what you want, when and where you want, without the old limits of space (put it anywhere), time (pair & play in moments), appearances (six cool or cute colors), cost, or size. In fact, it measures barely 2.5 cubed that s slightly smaller than a tennis ball, so when you bring it to the court, it s less intrusive than your water bottle. sound good? Why yes, actually, it sounds great. Rich, precision-tuned kinda hard to believe, for something so conveniently connected, via bluetooth, with your smart phone, ipod, tablet, etc.