Ultraportable Bluetooth® speaker with a surprisingly bigger sound that’s crisp and bassy as all get-out. Now with Outdoor Boost. Ultimate Ears WONDERBOOM™ 2 rocks a surprisingly bigger, bassy-er 360-degree sound — wherever you go. And with the new Outdoor Boost, you can crank louder, more powerful audio that’s specially tuned for listening outside. Packing 13 hours of continuous play, it bangs through impromptu raves, beach detours, and pool parties. No matter what you do, it goes on. And. On.