Welcome to the world of Ultimate Ears. Hear your music like never before with ultimate ears wonder boom, the super-portable Bluetooth speaker with surprisingly big sound that is clear, crisp, and full of big, beautiful bass. And even better, with 10 hours of playback and a completely waterproof design, you can take it anywhere. Go from picnics in the park to binge-watching shows with furry friends; from the beach to the shower and back without missing a beat. And if you need to really turn things up, quickly pair two together for even more sound.