The Ultimate Ears Wonderboom four is definitely the best cheap Bluetooth speaker on this list, combining good sound with an ultraportable design and powerful 360-degree audio. It's just a straight-up Bluetooth speaker (so no Wi-Fi) however you can pair two of them together either in stereo or dual mono. https://www.bluetoothspeaker.top/best-selling-flip-6-speakers-stereo-bass-subwoofer-wireless-tws-speakers/