The 8K HDMI 2.1 Cable improves the image quality with higher resolution and higher refresh rate, and is backwards compatible with previous HDMI 2.0b / 2.0a / 1.4 / 1.3 / 1.2 / 1.1 versions. 120HZ Refresh Rate：In 4K image quality, the refresh rate can reach 120HZ.
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