Graphics eXpansion Modules – split computer channel into several screens

Matrox DualHead2Go and TripleHead2Go external multi-display adapters let you add two or three monitors to your laptop or desktop computer. They connect to the video output of your system and use its existing GPU to provide high quality, uncompressed graphics and video across all monitors. These little black or silver boxes are perfect for bringing multi-monitor functionality to computers with only one monitor, such as systems with integrated graphics or no available expansion slots—or closed systems that have already been validated.

  • Connect two or three monitors to your system to see more, do more
  • Support VGA, DVI or DisplayPort™ monitors or projectors running standard or widescreen resolutions
  • Compatible with laptops and desktop computers, PC and/or Mac

http://www.matrox.com/graphics/en/products/gxm/