A Great Little Speaker for the Outdoors, The Avantree SP850

It's hard to see the forest through the trees when it comes to the portable speakers, but despite it's small size the Avantree SP850 has everything you need in a Bluetooth speaker, including FM radio and SD card. Labelled as a 3 in 1, the Avantree SP850 is more like a 4 in 1: a …