Stadia is Google's solution to cloud gaming and this is all you need to start playing from the cloud, the kit includes a Stadia Controller, a Google chromecast Ultra. Google Stadia is free to join and you only pay for the games you want but you can also pay a monthly fee of $9.99 to receive the pro version which includes 4k HDR gaming along with Dolby 5.1 Surround Sound along with extra perks such as free monthly games and game discounts. But the Chromecast Ultra is not just for gaming. Even if you are not here for the gaming, the Chromecast Ultra can transfer whatever your phone is playing to the big screen in beautiful 4k quality, so if for one moment you want to watch a movie and the next to hop on a game the Chromecast Ultra has you cover and is all just a click away.