A:AnswerI connected my laptop to the dock via USB, then connected my VGA monitor to the dock via included VGA adapter. I've been able to both mirror the laptop to the monitor and extend the display across both laptop and monitor using Windows 10 without problems. This docking station solved the HDMI to VGA problem very easily.
A:AnswerIf your surface Pro 3 is running a compatible system. See below:
Compatible with select operating systems
Including Windows 7 and 8, as well as Mac OS X 10.6.8, 10.7.5 and 10.8.3.
A:Answeras far as I can tell. I external monitor in addition to your laptop/tablet screen. The Targus has a DVI video connector. And includes a converter to convert to VGA.