Would you like to add a second monitor to your computer, but have only one video output? If you have an available USB 2.0 port, you can easily add a second display with this USB to VGA Adapter from Monoprice!This adapter connects to an open USB 2.0 port on a desktop or laptop PC and produces a VGA output at resolutions up to 1920x1080. The adapter is compatible with Windows XP and later, Mac OS X 10.4 and later, and the Linux operating system. The extra display can be configured as the primary display, a mirror of the primary display, or as an extension of the current desktop. The latter ability gives you the ability to see more open programs at the same time, which greatly increases productivity when working with multiple programs.The output is compatible with older style CRT displays as well as the newer LCD flat panel displays.*** 30-day easy returns. No restocking fee. Free lifetime technical support. 1 year warranty. ***