Directional HDMI Cable: The directional HDMI meaning that the source end of HDMI is required to connect to sources, must plug this end to HDMI output from source like DVD, computer, PS5, Xbox..., and another end is display to your monitor, TV, projector Active HDMI Cable: The HDMI fiber optic cable is an active HDMI cable, and active HDMI cable meaning that require stable power to work, it needs enough power to work properly Use the HDMI USB Cable: It comes with in the HDMI box; Why need use this HDMI USB cable; Since some HDMI slots, such as on HUB or on switch or on splitter, cannot provide enough power for the fiber optic HDMI cable 48 Gbps Bandwidth: Work on 8K 60hz, 4K 144hz, 4K 120hz, 4K 60hz, 2K 165hz, 2K 144hz, 2K 120hz, 1080p 240hz, 1080p 144hz, backward compatible with HDMI 2.1, 2.0b, 2.0a versions EARC: 1 feet to 100 feet support Audio Return Channel ARC and EARC; And ensure that the source end of the fiber optic HDMI cable is connected to the AVR receiver and the display end is connected to the TV Change TV settings: Most 4K 120 Hz TVs do not have all the features of HDMI 2.1 enabled; After installing the HDMI cable, you need to enable all HDMI 2.1 features in the TV settings by yourself; Your 4K TV will support 4K 120 Hz Change TV settings: Most 4K 60 Hz TVs do not have all the features of HDMI 2.0 enabled; After installing the HDMI cable, you need to enable all HDMI 2.0 features in the TV settings by yourself; Your 4K TV will support full 4K 60 Hz HDR iBirdie 8K Fiber Optic HDMI Cable 328 Feet 100 Meter 300, Directional Active Cord 8K 60hz, 4K 120hz, 4K 144hz, HDCP 2.3 2.1