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Hello, Thank you for the inquiry! The KD75X80J supports the features specified in HDMI 2.1(HDMI ports 3 & 4) such as the 4K120, ARC/eARC(only HDMI3), VRR, and ALLM. For more details, please check the TV model at our support website (http://www.sony.com/esupport) for product specifications and features. Hope this helps! Jay
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