A:AnswerI use this in conjunction with my Apple Thunderbolt Display which comes with a MagSafe power source. You’ll need a MagSafe to USB-C adapter, but it works to power the MacBook Pro.
A:AnswerYes! So long as the output signal doesn’t exceed the maximum resolution of the graphic card, you’re safe. I believe my MacBook can handle two 4K displays simultaneously or three QHD displays.