Ⅰ. Product description Welcome to use DTECH high-quality fiber optic cable products! ●DTECH fiber optic HDMI cable is an easy-to-use secure connection to solve various problems such as the stability, compatibility and distance limitation of traditional copper cables when transmitting high-speed HDMI video signals. ●The optical fiber provides the speed and bandwidth required for the highest image quality without the need for extenders, baluns or amplifiers. ●DTECH fiber optic cable does not contain EMI, and multiple cable pull wires can be installed to provide flexibility for the location of remote components. ●Support 48Gbps and 8K @ 60Hz performance, in line with HDMI 2.1 standard. ●Support HDMI 2.1 CDR, static HDR, dynamic HDR 10+. ●High-speed signals are transmitted through 4 multimode optical fibers, which have good anti-interference performance; support hot swap. ● Application scenarios: digital home theater, video classroom, security camera, meeting room, auditorium, LED billboard, outdoor advertising, airport and stadium panel information display, etc. Ⅲ. Installation matters ● Carefully open the contents of the shipping group, and shut down the entire system before connecting ● Insert the "HDMI Source" silver shell connector of the DTECH cable directly into the HDMI output port of the video source (DVD, Blu-ray, game box, etc.). Make sure that the cable is firmly inserted. ●Insert the "HDMI Display" black shell connector of the DTECH cable into the HDMI input port of the monitor (HDTV, LCD screen, projector, etc.). Make sure that the cable is firmly inserted. ●Turn on the power of the signal source and the display Note: Do not connect any intermediate cables or adapters between them, as this may cause degradation of signal transmission performance. ●The screen is distorted or display noise Check whether the picture resolution is correctly set for the signal source. For computer Windows display For other AV video sources, please refer to the manual to adjust