Megaboom 4 delivers powerfully loud, clear and immersive 360 sound with thundering bass. It's even bassier than the previous generation. Featuring Ultimate Ears signature sound, you can hear every note which is carefully balanced. MEGABOOM 4 is built tough and ready for adventure. Dunk it. Splash it. Drench it. Crank it. MEGABOOM 4 is designed to get seriously wet and keep on booming. It's floatable too. You've got no worries using it in the pool, near the beach or even in the shower. MEGABOOM 4 features a massive 20-hour battery life. It will last almost a full day on a single charge. Use PartyUp on the UE | BOOM App to pair 1, 2 , 3... and over 150 speakers and create the ultimate sound experience. You can combine multiple BOOM 4, MEGABOOM 4, EVERBOOM, EPICBOOM and HYPERBOOM speakers or even pair them with previous generation BOOM speakers. Build a wall of sound? No problem. Just push the MAGIC BUTTON for convenient controls of any streaming music. Play, pause, and skip tracks direct