Bluetooth belters at around $79 / £79. It isn't winning any awards for design, but it's IP67 h2o- and dustproof and it's a loud, likeable, bass-heavy sound that'll work for many a summer time accumulating ??at home or over the highway.The Wonderboom 4 is amongst the smallest speakers on our list ??it’s easy to handhold from any angle.Courtesy Ha