Is the USB port strictly a charger or does it function as a USB input as well? Just curious in case I wanted to use these for my laptop. The laptop does not have an optical output, but It does have bluetooth. A bit worried about sound quality over bluetooth.
KiwisFrom the look of it, I think the USB port is only for charging just like on the YU3, as the label says "USB Charge 5V/1A." It would say "USB Input" like on the YU2 if you could use it as an input.