A:Answer I don't have this yet, but I am considering buying it for my Surface 4 which has a USB 3 and a Mini Display female port next to each other. The two male ports on the adapter are a USB 3 and Mini Display port, not USB C. Once you plug the adapter into your Surface, you will have two USB 3 A ports and a USB 3 C port. Hence you with have three USB ports instead of one. You will also have both Mini Display Port and HDMI (more common) video port instead of just a Mini Display port. I don't think both video ports can used at the same time, but I could be wrong. In essence, the device is a 3 port USB hub and also gives you the option of using a monitor or tv with an HDMI port as a second display. You could do the same thing with a 3 or more port USB hub and a Mini Display to HDMI cable for about $15. This solution is a bit more elegant as it is a single device that plugs into your Surface. Lastly, I am speaking of a Surface 4 here. I am not certain, but I believe the Surface Pro 5 and 6 have the same ports as the 4. I do know the new Surface 7 has a USB 3.1 type C and A ports finally, although they don't support Thunderbolt 3 unfortunately.