The USB 2.0 VGA Adapter instantly allows you to add a second display through your USB 2.0 port. Simply install the included drivers, plug the USB 2.0 VGA Adapter into the USB port and your ready to go. Extend your desktop across both displays allowing you to increase your productivity like never before. Expand spread sheets across both monitors; in graphics programs increase your working area by putting all your pallets on the second display. USB 2.0 VGA Adapter is powered through the USB cable so no additional power supply is needed.