"Wherever you are, create your own club night with the SRS-XB40 wireless speaker. With deep bass and flashing lights, you can set the scene for a big night out."
This is the older model of this speaker that has way better sound quality than the xb41 which is their current model. Seems to be about 50 dollars cheaper than you can find new elsewhere. I own this model personally, and while there are speakers that sound better, for this price and battery life, it can't be beat.