A:Answer Hi, Tognela, 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. For X800H, the TV will support up to 18 Gbps transfer rates to support 4K HDR. For expanded support for additional HDM 2.1 features, please check out the X900H. Thank you. -Vincent
