Startechcom hdmi over cat5 video extenders startechcom st121hdbte the startechcom hdbaset extender kit extends hdmi up to 70m 230 feet over a single cat5e or cat6 cable the extender supports both ultra hd and full hd resolutions 4k 1080p with support for 3d and the accompanying digital audio for added versatility both the transmitter and receiver can be powered by the same single power source using power over cable poc the versatility of this video extender makes it an ideal so