Extend hdmi up to 165ft 50m over cat5e6 cabling with power over cable to receiver the st121shd50 hdmi over cat5ecat6 video extender kit lets you extend hdmi video and audio by up to 165 feet 50 meters over dual cat5e cables or 130 feet 40 meters over dual cat6 cables for added versatility the kit features power over cable and only requires a single power adapter that can be connected to either the transmitter or receiver with support for high definition resolutions of up to 1920x1