OVERVIEW: Incredible JBL Sound with a Dazzling Light Show Huge sound, dazzling lights and unbelievable power set this speaker apart from the crowd. The JBL PartyBox 310 packs a full party into a transportable, splashproof sound machine like no other. Turn up your favorite playlists anywhere, from get-togethers at home to dance parties on the beach. Bring big party vibes with 240 watts of JBL Pro Sound and a synced light show that grooves to the beat. Plug in and keep the fun going all night or...