UE Wonderboom 2

£89.99 FROM Ultimate Ears, ultimateears.com FEATURES IPX7 waterproofing, 13-hour battery life, connects to two devices at once, loop

Despite its 420g weight, the Wonderboom 2 floats on water and boasts an IP67 waterproof rating. The impressive 17W output is well balanced, offering clear highs and lows. You can control one speaker from two different sources, and connect two Wonderbooms for an even bigger sound. While the lack of a microphone is surprising (the speaker can’t be used for phone calls), the battery does last for 13 hours. ★★★★★