Usb-c has pd or power delivery (the lightning symbol on some ports) i just have the aux cord and power cord plugged into the adapter. My usb charger fits perfectly in the unit.

I wish it was a bit cheaper in cost, but i'm certainly not disappointed with the outcome. Can't recommend this more.

A real peice of junk. Not even close to fast. Just pitifully slow. The sound quality is so painfully bad this product is not worth using.

All i hear is a notification prompt that something is charging and has stop charging, without end. Takes 8 hours to charge 20%. Not worth the cost to have to replace them five or six times a year. Now i just use it for music and that's it.