So this is the Soundboks gen 4… its basically a refined version of the Soundboks gen 3 which was redesigned from the ground up, but the Gen 4 now has better sound quality, its a little more efficient, and the grill is a lot easier to swap out. So now, the Soundboks gen 4 is an even better option if you want to take big sound everywhere you go, and the last thing you want to worry about is your speaker having to keep up.