This is probably Google's 4K Chromecast “Ultra”

Chromecast with Google TV (4K vs. HD) Review: Among the Best

Google Revolutionizes Chromecast With 4K And HDR Support

Google Chromecast with Google TV - Streaming Entertainment in 4K HDR - Snow GA01919-US - The Home Depot

Google Chromecast with Google TV (HD) vs. Chromecast with Google TV (4K): What's the difference?

I love Stadia and Google TV, but needing to have a Chromecast Ultra too is kind of infuriating. : r/Stadia

Chromecast with Google TV vs Chromecast: What's new?

Google Chromecast Ultra 4K HDR in India - Unboxing, Setup & Review!

Chromecast Ultra review: Better video quality comes at a cost

Chromecast with Google TV wants to help you find what to watch - Video - CNET

Lower-end 'Chromecast HD with Google TV' coming - 9to5Google

Google Chromecast with Google TV - Streaming Entertainment in 4K HDR - Snow GA01919-US - The Home Depot