It only has one DVI port and the USB-pass-through. Funny as it is, I am writing this post on a Dell 30" screen connected via this very adapter to a 2015 MB Pro.

It only has one DVI port and the USB-pass-through. Funny as it is, I am writing this post on a Dell 30" screen connected via this very adapter to a 2015 MB Pro. Yes, this was one of the worst contraptions of a dongle ever made, but in this case, it was the only way to create dual-link DVI ouptut (needed for resolutions larger than 1920x1080) from a Displayport.