Ultimate Ears Wonderboom 3 ($100 on Amazon): Like the Sony SRS-XB100, the Ultimate Ears Wonderboom 3 is a small, round and waterproof Bluetooth speaker that can float in water. It delivers heavier ...

At the other end of the scale is this diminutive Bluetooth speaker from Pure. The Woodland Glow is a rugged device that combines 360° audio, a built-in USB charging port and an adjustable LED light.

A small, round portable speaker, the Ultimate Ears Miniroll is super portable and bag-friendly. It only measures 4.82 x 10.5 x 12.27cm and weighs 279g. It's circular in shape but relatively flat, so ...

The latter helps to boost the bass response from small speakers ... the speakers to Bluetooth pairing/playback mode, and another tap takes you back to the USB connection. Round the back is a ...