?Unidirectional Transmission?Snowkids 8K Fiber Optic HDMI Cable is the unidirectional transmission with marked?SOURCE/DISPLAY?. please note: that the source is the signal source (laptop, PC, ps4/ps5, Xbox and Blu-ray player, etc) and the display is the display end (monitor, TV, projector, etc). So make sure you plug in each end correctly (if not then you will get no image from the device). ?Durability high-quality materials?It can guarantee high-speed transmission without signal loss. Due to the SR technology, the flexural strength design can withstand up to 25,000 flex times. The plug part is still made of 24K gold-plated material, which accurately transmits signals. The military-grade tensile nylon material also greatly extends its life. ?4K@120Hz for Gaming?It can achieve a super smooth picture of 4K@120HZ for gaming. Its latest game mode supports variable refresh rates, maximizes the value of the graphics card and CPU, and is more accurate in the processing of rendered images. Variable Refresh Rate and Quick Media Switching reduce lag, motion blur, and frame tearing so that you can achieve smoother delay-free gaming and real-time interactive virtual reality. ?Future Technology-8K@60Hz HDMI Fiber Optic Cable?Snowkids 8K HDMI 2.1 Fiber Optic Cable is compatible with 8K@60HZ, 4K@120HZ and 4K@100Hz, and more. With 8K HDMI's unique dynamic HDR and 12 Bit color processing technology and 48Gbps bandwidth, it can provide the Ultra High Definition cinematic experience and 3D visual effects with more ideal depth, brightness, detail, contrast, and wider color gamut. Supports HDCP2.2 when using HDCP2.2 video source. ?UHD HDMI 2.1 Fiber Optic Cable?Snowkids Real 8K HDMI Fiber Optic Cable meets the standard HDMI 2.1 Version and is also backward compatible with HDMI 2.0b/2.0a/1.4/1.3/1.2/1.1 versions. Compared to HDMI 2.0 and 1.4, its transmission speed is three times faster than Ultra HD 4K content, solving the problem of lagging or dropped frames. Support eARC can achieve more advanced audio signal control capabilities. With Dolby Atmos and Dolby Vision, you can have an immersive experience.