Product description: The MT-50T Audio/Video Extender System allows you to extend the distance between the computer system unit and the display monitor by up to 50m/500ft (for video resolutions of 1280x1024 @ 60Hz) using one lan cable(Cat5,Cat5e,Cat6).A road VGA Audio/Video extender,it is twisted pair video VGA extension system that has anti-static, anti-lightning, anti - interference function,design for middle-quality or high-quality Audio/Video singal tranfer to long distance. It accomplishes this by means of a local transmitting unit (MT-50T TR), and a remote receiving unit (MT-50T RE), connected by Cat 5e twisted pair cable.