M-HFK20U transmits high-definition video signals over long distances through optical fiber, supports KVM or RS232 function, and can operate remote devices using a keyboard and mouse or RS232. This product transmits HDMI high-definition audio and video signals with a resolution of 3840*2160@60Hz over 20KM without compression through 10 Gigabit optical fiber, it supports KVM signal or RS232(optional), independent audio transmission, and supports local loop output, which reduces costs for users while ensuring signal stability. This model has a built-in learning EDID function, which greatly improves the compatibility of the device.