https://www.techradar.com/news/ultimate-ears-wonderboom-2-promises-big-sound-in-a-small-package > Ultimate Ears has launched its latest portable speaker, the Wonderboom 2, the second generation of its popular waterproof speaker. > The new speaker has been optimized for listening outdoors, with an 'Outdoor Boost' mode, an IP67 dustproof/waterproof rating, and an impressive 13 hours of battery life – an increase of 30% compared to its predecessor.