, Always ready to go: Keeps your speaker charged and ready for any adventure , Works with: Ultimate Ears BOOM 3, MEGABOOM 3, BLAST and MEGABLAST wireless speakers , Convenient home base: Makes charging your speaker easier than ever , Listen to music and more while charging , Sleek design: Fits into any home and looks stunning with any of the BOOM 3, MEGABOOM 3, BLAST and MEGABLAST colors