The extender uses one piece of standard CAT6/7 (cable length max up to 150m) to transmit the HD Signal from the DVD, HD Player, PC and other HD source set to the Display at distance. It follows the TCP/IP protocol to send the HD Video by the local area network, it supports one sender to multi receivers and Cascade connection way to transmit the HD Signal by the help of Ethernet switcher. Also it can return the received IR signal at the receiver to the sender to help the users to control the HD source at long distance. For HDMI Cable have limit at the length and cost, so the extender is for solve the low cost and long distance HD Signal transmit need.