The 120m HDMI extender use single cat5 or cat-6 (recommended) cables up to 120 metres. HDMI extender over cat5/cat6 is designed to convert HDMI signal to standard TCP/IP and transmit by internet cable or Lan. With the advantage of TCP/IP standard, it can transmit HDMI signal source from HD STB, DVD, PS3, HDMI display etc to HD projector, DLP, LCD, LED and other audio visual equipment