The Matrox DualHead2Go DP Edition external multi-display adapter adds up to two monitors to your Mac or PC laptop or desktop computer. It connects to the single Thunderbolt™, DisplayPort ™ or Mini DisplayPort video output of your system and uses the system's existing GPU to provide high-quality, uncompressed graphics and video across all monitors. Ideal for business and professional users looking to increase their productivity with a dual display setup, this little black box lets you run different applications on each monitor or view one application across two monitors. Also compatible with projectors, it includes Matrox PowerDesk software to easily manage your desktop configuration, and supports clone mode to show the same content on all displays. This external device is quick and easy to install, and won't void your system warranty.