What is Chromecast Ultra? Stream up to 4K Ultra HD & HDR picture quality over your Wi-Fi network with Chromecast Ultra, a streaming device that plugs into your TV‚Äôs HDMI port. Chromecast Ultra provides fast, reliable performance with minimal buffering and smooth streaming A great way to get 4K video and more to your TV Your phone is a simple, powerful remote. Open the mobile apps that you already know and love to quickly access things such as your TV shows, your playlists, your queues. No new logins or downloads required. Simply tap the cast button to see your favourite content on the big screen in up to 4K. No matter what resolution is available, Chromecast Ultra will optimise your picture.By using your phone, it‚Äôs easy to search, browse, queue and control the TV from anywhere in the home. And you can still keep using your phone for other things without disrupting what‚Äôs playing or draining your battery. Picture perfect, up to 4K Ultra HD & HDR You‚Äôll enjoy a crisp picture, deep colour and fast load times streaming 4K content to a 4K TV with Chromecast Ultra. Whether your TV is 4K or HD, Chromecast Ultra automatically optimises your content for the best picture quality your TV can deliver. Entertainment, all on your schedule Choose from 4K-enabled apps like Netflix and YouTube, or browse over 200,000 TV shows & movies, 30 million songs, plus radio, sport, games and more.