This is the Alto Uber Backpack from one of the leading brands in innovative, user-friendly speakers. This super handy back pack comes equipped with comfortable carry straps that can be readily adjusted to suit you, and ample space to fit either your Alto Uber PA or your Alto Uber LT making it easier than ever to transport your speaker from place to place. And thanks to the mesh front panel the music doesn't have to stop either, as you'll still be able to hear your speaker loud and clear.