Bluetooth codecs: For reasons I cite in my blog about Bluetooth audio codecs, we didn’t mandate the inclusion of any specific Bluetooth codec—the technology that lessens the amount of data inside a digital audio file so it could stream reliably about a Bluetooth connection. We use the following requirements https://www.bluetoothspeaker.top/soundbox-subwoofer-wireless-roundness-column-aluminum-alloy-bluetooth-speaker/