The Matrox Dualhead2Go Digital Mac Edition (ME) external multi-display adapter adds up to two DVI monitors to your laptop or desktop computer. It connects to the single Mini DisplayPort™ video output or Thunderbolt™ port of your system and uses the system's existing GPU to provide high-quality, uncompressed graphics and video across all monitors. Ideal for business users and content creators looking to increase their productivity with a dual display setup, this little silver box lets you run different applications on each monitor or view one application across two monitors.