The J5create multi monitor adapter acts as an external video card for your Mac or PC
It allows you to add an additional monitor/display through your USB 3.0 port
There's no need to open your computer to add an expensive video card
With the USB 3.0 to dual HDMI mmulti monitor adapter you simply load the drivers, plug the adapter into the USB port, then plug in the HDMI monitor cable into the adapter and you are ready
The Adapter supports three viewing modes
Primary Mode allows you to have individual applications open on each monitor, vastly improving productivity
Extended Mode allows you to extend your desktop across multiple displays, which is great for spreadsheets