This USB to display converter allows you to adapt an available USB 3.0 or 2.0 port to one or two displays via DVI/VGA and/or HDMI. It provides a simple video solution capable of adding multi-monitor displays to a USB enabled desktop or laptop computer. It can be used to mirror a desktop, showing the same image on each display, or to extend a desktop on to a second or third monitor to double or triple a workspace. This device also can be used as a USB to Ethernet converter with the available Gigabit Ethernet Lan port. This product cannot be used as a main display, as there should be a display plugged directly into the source.