The Ultimate Ears Wonderboom 4 is definitely the best cheap Bluetooth speaker on this list, combining good sound with an ultraportable design and productive 360-diploma audio. It's just a straight-up Bluetooth speaker (so no Wi-Fi) but you can pair two of them together both in stereo or dual mono. https://www.bluetoothspeaker.top/wholesale-waterproof-bluetooth-speaker-car-clip-bluetooth-speaker/