The Google Chromecast Ultra is a streaming media player that allows you to stream content from various streaming services directly to your TV. Here are some key features and specifications of the Google Chromecast Ultra:

1. 4K Ultra HD Streaming: The Chromecast Ultra supports streaming in 4K Ultra HD resolution, delivering high-quality video content with vibrant colors and sharp details. It is compatible with 4K-enabled TVs and content sources.

2. Streaming Services: You can access a wide range of streaming services through the Chromecast Ultra, including popular platforms like Netflix, YouTube, Disney+, Hulu, Amazon Prime Video, and many more. It lets you cast content from your smartphone, tablet, or computer directly to your TV.

3. High Dynamic Range (HDR): The Chromecast Ultra supports HDR formats such as HDR10 and Dolby Vision. HDR enhances the contrast, color accuracy, and overall picture quality, providing a more immersive viewing experience.

4. Ethernet Connectivity: Unlike the standard Chromecast, the Chromecast Ultra includes an Ethernet port on the power adapter. This allows for a more stable and reliable internet connection, especially if you have poor Wi-Fi coverage or prefer a wired connection.

5. Google Assistant Integration: You can control the Chromecast Ultra using your voice through Google Assistant-enabled devices, such as Google Home speakers or compatible smartphones. This feature allows you to search for content, adjust volume, play, pause, and more hands-free.

6. Mobile Device Mirroring: In addition to streaming content, you can mirror the screen of your Android or iOS device onto your TV using the Chromecast Ultra. This feature enables you to display photos, videos, presentations, or other content directly on the big screen.

7. Setup and Control: Setting up the Chromecast Ultra is straightforward. Simply plug it into an HDMI port on your TV, connect it to your Wi-Fi network, and use the Google Home app to complete the setup process. Once set up, you can control the Chromecast Ultra using your smartphone, tablet, or compatible apps.

Please note that this information is based on the capabilities of the Chromecast Ultra as of my knowledge cutoff in September 2021. It is always recommended to check the official Google website or trusted sources for the latest information and specifications of the Chromecast Ultra.