Bluetooth codecs: For reasons I cite in my website about Bluetooth audio codecs, we didn’t mandate the inclusion of any specific Bluetooth codec—the technology that reduces the amount of data in a very digital audio file so it may stream reliably over a Bluetooth connection. We’ve tested about 50 speakers https://www.bluetoothspeaker.top/outdoor-portable-colorful-led-speakers-wholesale-wireless-stereo-bluetooth-speaker-with-led-light/