The Ultimate Ears Wonderboom 4 is unquestionably the best cheap Bluetooth speaker on this list, combining good sound with an ultraportable design and productive 360-degree audio. It is just a straight-up Bluetooth speaker (so no Wi-Fi) but you can pair two of them together either in stereo or dual https://www.bluetoothspeaker.top/bluetooth-speaker-ipx7-waterproof-wireless-speaker-8h-playtime/