There are a wide range of Bluetooth speakers available, and perhaps this isn’t surprising. Carrying sound with you wherever you go isn’t a problem these days. Technological developments mean that it’s easy to find a compact, light solution that doesn’t need to cost a fortune. And given that we’re all running around with about 20 million songs in our pockets, it seems like a carefully selected Bluetooth speaker is an all but mandatory gadget to add to your home technology list. The major advantage with a Bluetooth speaker is that it's portable. The combination of battery operation and wireless freedom – normally using Bluetooth – means that you can easily play music indoors but also take your speaker out into the garden. The Bluetooth protocol normally allows for distances of about 10 m between the speaker and the music streaming source – sometimes more, but also sometimes less. The range depends partly on the version of the Bluetooth protocol in use, and partly on the materials and other things used in the speaker.