Mini DisplayPort | Thunderbolt + USB to Dual-Link DVI Adapter

The Mini display port + USB to Dual-Link DVI signal format converter seamlessly connect next generation display port based MacBook, MacBook Pro, or MacBook Air with a Mini display port to conventional DVI displays, such as CRT, LCD monitors and projectors, especially for 30-inch Apple Cinema Display, you can enjoy the ultimate widescreen canvas with a resolution of 2560 x 1600 pixels

This device is not bi-directional.  It can only connect a Mini-display port source to an DVI display.  It will not work in reverse.   Features: Support Mini display port 1.1a input and Dual-LInk DVI or Single-Link DVI output Support Resolution 2560x1600 on the 30-inch Apple Cinema Display Support Dual-Link DVI video resoution to WQXGA 2560x1600 Support Single-LInk DVI video resolution 1920x1080 Support deep color 24bit Support 268.5MHz bandwith Powered from Mini display port source and USB port. Thunderbolt compatible