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This package contains two HDMI 2.1 female-to-female cable couplers for convenient HDMI cord extension. Built to HDMI 2.1 high-speed specification, it delivers high frame rate high-resolution visuals, vivid HDR color performance and lossless eARC surround sound without signal attenuation. Premium gold-plated terminals prevent oxidation and poor contact caused by long-term use. The compact slim housing saves space behind wall-mounted TVs and gaming devices without blocking adjacent ports. No external power supply or software installation needed, perfect for extending HDMI cables for gaming consoles, desktop monitors and home entertainment systems.