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portable Bluetooth® speaker. Equipped with one-touch music control. and stunning high performance fabric. it’s the ultimate go-anywhere speaker that’s more bold and bassy than ever. BOOM 4 packs a sonic punch for its size. Featuring Ultimate Ears unique audio processing. it produces clear and balanced audio faithful to the music you love. and at every volume level. With the iconic cylindrical design. we pioneered to deliver immersive. stereophonic audio that radiates evenly in all directions. BOOM 4 gives your music a deep. Enjoy the punchy bass without exaggeration or distortion. SIGNATURE + 4 PRE-SET EQ MODES. Enjoy the Ultimate Ears Signature sound and several EQ modes like Bass Boost. and Podcast/Vocal from UE | BOOM App. Didn’t find your favorite? Customize it yourself. BOOM 4 was born to hit the road. From rooftop-raging to mountaintop-shredding. It's more powerful than you expect. BOOM 4 gives you 15 hours of sonic power on a single charge. This portable speaker has long battery life that keeps the party going. Use PartyUp on the UE | BOOM App to pair 1. and over 150 speakers and create the ultimate sound experience. You can combine multiple BOOM 4. EPICBOOM and HYPERBOOM speakers or even pair them with previous generation BOOM speakers. Build a wall of sound? No problem. and skip tracks directly from your BOOM 4. Set up one-touch playlists on your favorite streaming platforms like Spotify®. and Apple Music for iOS by UE | BOOM App. Plastic parts in BOOM 4 include a minimum of 52% certified post-consumer recycled plastic by weight. It’s also designed for recycling.