Ultimate Ears Boom 4 Bluetooth Speaker Color:Active Black Quantum HDR delivers expanded range

Quantum HDR delivers expanded range of color and contrast

increases circulation and improves mobility

but also plenty of comforting

No seriously

Ultimate Ears Boom 4 Bluetooth Speaker Color:Active Black Quantum HDR delivers expanded rangeGrab the super portable wireless Bluetooth speaker that's built for adventure. Seriously waterproof with balanced 360 degree sound, deep bass, and one touch music controls, the Ultimate Ears BOOM 4 is the ultimate go anywhere speaker. Experience four different EQ modes or customize yourself. The BOOM 4 is an extremely wireless speaker with 45 meters (147 feet) of range, so you can walk away and keep the tunes comin'. Ultimate sound. Made to wander.