Bluetooth codecs: For reasons I cite in my site about Bluetooth audio codecs, we didn’t mandate the inclusion of any specific Bluetooth codec—the technology that lessens the amount of data in the digital audio file so it might stream reliably in excess of a Bluetooth connection. Bose's second-generation Flex https://www.bluetoothspeaker.top/outdoor-waterproof-bluetooth-speaker-wireless-shower-travel-speaker/