Ultimate Ears BOOM 4 Portable Waterproof Bluetooth Speaker With 360-Degree, Bold, Immersive, Crystal-Clear Sound, Floating Speaker With 15-Hour Battery and 147ft (45m) Range, RedExperience bold, immersive audio wherever life takes you with the Ultimate Ears BOOM 4. This compact, floating Bluetooth speaker is designed to deliver 360 degree sound that fills your space with clarity and balance at every volume level. The red BOOM 4 builds on UEs legendary audio processing to ensure your favorite tracks stay faithful to the music you love, from delicate acoustic passages to commanding bass lines. Built to hit the road just as hard