AudioQuest's Root Beer 18 active optical HDMI cable extends pristine 4K-8K video and audio transmission up to 100 feet without signal degradation. Optical fiber technology eliminates distance-related distortion while providing complete RF immunity and galvanic isolation—critical advantages for noise-free signal transmission. Direction-controlled eARC and communication conductors minimize radio-frequency interference affecting active circuitry. Powered directly from the HDMI port with no external adapter required, Root Beer 18 delivers exceptional audio-video performance across extended home theater installations.