Enjoy rich; colossal sound even amidst a noisy environment with the Ultimate Ears Boom 4 Portable Bluetooth Speaker. Thanks to Outdoor Boost; you can hear your playlist loud and clear. - EQ mode with UE | BOOM by Ultimate Ears app (download required) provides 360° big bass and balanced sound - Offers 15 hours of battery life; letting you enjoy listening to your playlists for extended periods - Features Outdoor Boost setting and made compatible with BOOM; MEGABOOM; EPICBOOM; and HYPERBOOM (not included) to deliver bigger sound - IP67 floatable and water- and dust-proof design helps it withstand harsh outdoor elements - BOOM app (download required) allows you to easily access your playlist even with the speaker off What's in the Box: - 1x Ultimate Ears Boom 4 - 1x USB-C Cable - 1x Quick Start Guide ( printed inside the box)