The GVE200 DVI-D Video Extender means that you can extend the distance between the computer system unit & the display unit by up to 65 feet. It accomplishes this by means of a local transmitting unit & remote receiving unit connected by standard solid Category 5e/6 Ethernet cable. The GVE200 Video Extender System is ideal for factory & construction sites, or any installation where the display needs to reside in a harsh setting, but you want the system equipment kept in an environmentally friendly location. The Extender System is also useful for control & security purposes, where you can have the system unit in a secure area at the same time that you put the display in an area that is convenient for viewing.