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Hi Dave, There is much confusion about the HDMI versions and concerns about compatibility. For this reason, we do not promote the HDMI versions incorporated on many of our products. Instead, we advertise the features of a product that are associated with a particular HDMI version. HDMI 3 and 4 of the X900H TV supports 4K120 and eARC (via software update). There are also plans to have more HDMI 2.1 standard features (VRR and ALLM) for this model (via a software update). Regards, -Ralph
Sorry, there was a problem. Please try again later.HDMI ports 3 and 4 are the 2.1 ports that do 4K 120hz
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