The GVE120 Video Extender System extends the distance between your computer system and the display monitor by up to 430 feet. Use the local transmitting unit (GVE120L), and remote receiving unit (GVE120R), connected by standard Category 5 twisted pair Ethernet cable (or Cat 5e ann Cat 6). Ideal for factory and construction sites or for control and 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.