Updated the format of the guide to make it simpler to navigate. Included additional about how we test Bluetooth speakers into the introduction. Updated FAQs at the tip to replicate our current decisions. Taken off a discontinued products from the list. The Wonderboom 4 is among the smallest speakers https://www.bluetoothspeaker.top/usb-bluetooth-speaker-with-hd-sound-usb-wireless-stereo-bass-speaker/