Enjoy powerful 360° sound and deep bass with the UE Ultimate Ears Boom 4. Outdoor Boost enhances clarity in noisy environments, while the UE BOOM app (download required) offers EQ controls and playlist access. Up to 15 hours of battery life and USB-C charging keep the music going, and IP67 floatable, water- and dust-proof construction stands up to outdoor use. Compatible with BOOM, MEGABOOM, EPICBOOM, and HYPERBOOM for bigger sound when paired.