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.