The AC-EXO-444-KIT is a professional HDMI extender designed for ultra-long distance HDMI signal transmission via fiber optic cable. Supporting HDMI 2.0 a/b with a bandwidth of 18 Gbps, it extends signals up to 2 kilometers over single-mode fiber and 300 meters over multi-mode fiber. This kit includes features such as HDR10+, Dolby Vision, EDID management, and built-in 4K/HD test patterns for troubleshooting, ensuring high-quality video with preserved deep color and HDR metadata. Additional functionalities include bi-directional IR and RS232 transport, Toslink multi-channel audio extraction, HDCP 2.2 compliance, and robust ESD protection. Suitable for commercial and residential applications, it offers clean installs, cascading for ultra-long distances, and integration with matrix switches and third-party control systems.