The EXT-DVI-FMP30B is a kit containing the Gefen EXT-DVI-FMP and 30 ft. 4 strand LC-LC cable. The DVI FMP Extender extends your DVI display up to 2000 feet away from your source, with only two tiny transmitters and receivers required, using a 100% optical fiber solution. It's a great way to extend DVI video easily and unobtrusively. The DVI FMP sender unit plugs into your computer. The DVI FMP receiver unit plugs into your DVI display - up to 2000 feet away. Multi mode LC fiber optic cable (4 strand) connects the DVI FMP sender and the DVI FMP receiver units to each other. Breakthrough Auto-EDID programming technology quickly and easily collects and preserves monitor resolution/capability information inside the DVI FMP sender, so that the computer properly syncs up with the display at all times and inchknows what it is connecting toinch -- eliminating the necessity of an add-on device such as Gefen's DVI Detective. All-fiber signal transmission media insures that the video signal possesses complete EMI (electromagnetic interference) invulnerability.