The GUCE51 comprises two units, Local and Remote. These units are interconnected with Cat5, Cat5e, or Cat6 cabling. Now you can extend peripherals to locations up to 198 feet away. Features Use Cat5, Cat5e, or Cat6 RJ/45 cabling to extend your USB peripherals up to 198 feet away Transparent data extension Extremely easy to install Compact design, allows for easy placement Fully compliant with (1.0, 1.1) USB standards For use with any USB compatible computer No software required. Requirements For MAC Users Mac OS 8.6 or Greater For PC Users Windows 98, 98SE,2000, ME, XP