The Apple TV 4K is a media streaming device developed by Apple that allows you to watch movies, TV shows, and other video content on your TV. The 64GB model is one of the storage options available for the Apple TV 4K. 

The device supports 4K HDR video, providing you with a high-quality viewing experience. It also has Dolby Atmos sound, which enhances the audio quality of your content. The Apple TV 4K is compatible with popular streaming services such as Netflix, Hulu, Amazon Prime Video, and Apple's own streaming service, Apple TV+. 

With the Apple TV 4K, you can also access live sports, news, and other content from popular cable and satellite providers, using the TV app on your