The st12mhddc hdmireg to cat5 extender kit lets you extend an hdmi audio and video signal over a single cat5 or cat6 cable up to 330 feet 100 meters the extender offers a highly scalable installation when used with the optional st12mhddcrp repeater units quickfind code 516965 which can be daisy chained to additional displays at greater distances over cat 56 with up to 30 broadcasting levels to over 100 displays with 2 rj45 to hdmi output ports per unit each repeater allows you to outp