Introducing Chromecast UltraDelivers everything you love about Chromecast plus faster processing speeds and up to 4K Ultra HD & HDR picture quality*. Chromecast Ultra works with iPhone®, iPad®, Android devices, Mac®, Windows®, and Chromebooks.
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Own older Chromecast, great for 1080p TVs, Best buy associate from whom I bought my SUHD TV recommended Ultra for the new TV. It's worth it for 4K even if TV has upscaling. If you don't have fast WIFI or have a lot of wireless devices on your network, the Ethernet is a nice option. Wireless setup can be awkward depending on security settings and type of router.