Updated the structure of the guide to make it simpler to navigate. Added far more about how we test Bluetooth speakers on the introduction. Updated FAQs at the top to reflect our current choices. Eradicated a discontinued product through the list. The Wonderboom 4 has become the smallest speakers https://www.bluetoothspeaker.top/best-seller-original-8-hours-playtime-waterproof-bluetooth-speaker-for-mobile-phone/