All LG 4K TVs manufactured after Sept 2014 have HDMI 2.0 ports as does this 2015 LG LG - 43" Class (42.5" Diag.) - LED - 2160p - Smart - 4K Ultra HD TV - Black, Model # 43UF6400...^IFV

All TVs have a native resolution so that every broadcast or format they receive will be displayed in their native resolutions and will only be able to display video at their respective native resolutions and no higher. This basically means that a TV set is better at displaying HD broadcasts that are in its native resolution. The LG 43" Class (42.5" Diagonal) 4K UHD Smart LED TV w/ webOS 2.0, Model # 43UF6400 has a native resolution of 2160p which is four times as many pixels as 1080p TVs. Major network signals are broadcast in high definition at either 720p or 1080i and your cable/satellite box can be set to output a specific resolution. So when you watch HD content (720p, 1080i and 1080p are all considered HD) on the LG 43UF6400, it uses a process called upconverting (or upscaling) to convert incoming sources to fit its 4K screen. Think of upscaling as a stopgap measure in the absence of true 4K players and content, just as with DVD players that upscaled their content to 1080P, upscaling noticeably reduces the appearance of blockiness and jagged edges, and while a 1080p upscaled image may look good on a 4K TV, it will not look anywhere near as sharp and detailed as 4K content nor as good as 1080p content on a 1080p screen...^IFV