The ETS AV970 VGA Video + Stereo Audio Balun Set allows computer video + stereo audio signals that adhere to the VGA/SVGA/XVGA standards to be transmitted over Category 5 or better UTP wiring. All modes and resolutions operate normally. Distance and quality of transmission are dependent on the type of cable used and monitor sync circuitry. Ordinary UTP cabling may be used, however distance and quality are enhanced with Cat5 or better cable. The circuitry in the AV970 set of VGA video baluns is fully passive, requiring no external power. NOTE: For transmission, two Category 5 cables are needed.