One pair provides a complete, plugandplay functional module. No setup is required. It supports 1080P at 60Hz, local loopout, and longdistance transmission up to 60 meters. Low power consumption, low operating temperature, and safety. It supports mouse and keyboard extension. The system uses CAT5e/6 cables that follow the IEEE568B standard. HDMI cable length is fixed after production. The HDMI connector can only be soldered or terminated by professional workers in the factory, so users cannot change the HDMI cable length themselves. CAT5e/6 cables are widely available and can be easily processed by users or installers. The HDMI head is large, so installation should be hidden and the route should avoid easy bending or pulling through inwall tubes or trays. CAT5e/6 cables do not have these limitations. Use scenarios Home theater or living room: Connect an HDMI source (Bluray player, game console, streamer) to a display far away (up to 60 meters) using the CAT5e/6 link. The local loopout allows an additional monitor to be connected nearby for convenience, while the main signal reaches the distant screen. Conference room or classroom: Extend HDMI from a source PC or media player to a projector or large display. The system supports keyboard and mouse extension on the receiving end, enabling control from the room without moving the PC. Digital signage or retail installation: Route a media player's HDMI signal to a display mounted away from the source, with the flexibility of using standard CAT5e/6 cables for easy routing and inwall installations, avoiding the need to pull bulky HDMI cables through restricted spaces.