You can stream 4K content from Netflix, YouTube and Vudu. Google Play Movies & TV will be getting 4K content later this year says Google and also says Chromecast Ultra automatically optimizes your TV’s picture even if your TV isn’t 4K-ready. Other features are similar to earlier Chromecast devices including, casting content from apps using your phone, tablet or laptop, mirroring content from Android device or from a browser tab on your laptop (using Chrome) to the TV and more.
Up to 4K Ultra HD resolution
Connectors: HDMI, Micro-USB, Ethernet
Wi-Fi 802.11ac (2.4GHz/5Ghz) 1×2 SIMO
Power adaptor with Ethernet port