https://www.youtube.com/watch?v=jmkka5w2te8 Cool Bluetooth Speaker Retro 20W. Bluetooth 8W Stector SD/USB Reader and AUX/RADIO FM. Cool retro 20W speaker is compatible with all Bluetoooh devices. It is a high -fidelity speaker, with clear and clear sound. The speaker has a distance range of up to 10 meters. With the auxiliary line,...