Portable Bluetooth speaker specialists Ultimate Ears have released a new iteration of its waterproof WonderBoom speaker in the lead up to summer.

The floating WonderBoom 2 ($129) boasts an extended battery life (now claimed to last 13 hours), stereo pairing and an IP67 rating, along with a new Outdoor Boost mode specifically tuned for outside listening.

As well as the outdoor EQ, Ultimate Ears claim the new generation speaker has a lower cutoff frequency than its predecessor for improved bass performance.

The Logitech-owned company’s general manager Charlotte Johs said the new WonderBoom gives listeners “even more of what they enjoy” in the previous model.

“We’ve taken on-the-go music listening even further with new audio features that fit your outdoor environment and the ability to experience true stereo sound,” Ms Johs said.

The speakers come in two-tone fabric colourways, drawing inspiration from increasingly popular “athleisurewear” fashion, and is available in Black, Grey, Red, Blue and Pink.

The WonderBoom 2 is now available from Myer and JB Hi-Fi.