Connect your Mini Display Port video source to a DVI-D display The MDP2DVID Mini Display Port to DVI-D Dual-Link adapter lets you connect your Mini Display Port video source (Macbook, Macbook Pro, Macbook Air, etc.) to any DVI-D display, including televisions & Apple Cinema Display HD, eliminating the expense of having to upgrade to a Mini Display Port-capable monitor. The Mini Display Port adapter offers an active conversion, which is powered by a single USB (Universal Serial Bus) port & is able to handle full dual-link resolutions (up to 2560x 1600). Use it to mirror your display to another monitor, or extend your desktop to increase your workspace. Backed by a Star Tech.com 2-year warranty & free lifetime technical support. " * USB (Universal Serial Bus)-Powered operation means no wall outlet or bulky external power adapter is required * Active conversion allows full dual-link DVI resolution (2560x 1600)"