100-meter HDMI extender typically supports up to 4K resolution, uses a single Cat6/6a/7 cable for transmission, and features an HDMI 1.4 or higher standard, along with HDCP compliance. Key specifications often include support for high-speed data transfer (18Gbps or 10.2Gbps), multi-channel audio, and control features like IR or RS-232. Power is usually supplied to both the transmitter and receiver units, although some models may support Power over Cable (PoC).