The Ultimate Ears Wonderboom four is unquestionably the best cheap Bluetooth speaker on this list, combining good sound with an ultraportable design and powerful 360-diploma audio. It's just a straight-up Bluetooth speaker (so no Wi-Fi) however you can pair two of them together both in stereo or dual mono. https://www.bluetoothspeaker.top/multi-color-wireless-subwoofer-speaker-inalambrico-bluetooth-speaker/