Support hdmi, dvi or vga input port you can connect the display to one of hdmi/dvi/vga output ports
3-in-1 Mini DisplayPort (Thunderbolt)To DVI VGA HDMI TV Adapter Cable For Apple iMac and MacBook Surface Book Surface Pro 3/4 ThinkPad X1
Input Signal: Mini Display Port 1.1a Output Video: HDMI/DVI/VGA Input: Mini Display Port Male 20pin Output: HDMI Female Type A 19pin Connector:DVI Female (24+5) VGA Female 15Pin
Three output ports: DVI VGA HDMI and a Mini Display Port.you want to use the DVI output, you just need to connect the DVI devices using a DVI cable. And when you want to use the HDMI output, you just need to connect the HDMI devices using a HDMI cable. When you want to use the VGA output, you just need yo connect the VGA devices using a VGA cable.
Please note: it does not support more than one output simultaneously!