Google no longer sells the Chromecast with Google TV 4K and its cheaper HD variant. Both devices have now been discontinued following the launch of the Google TV Streamer last year. However, there are plenty of alternatives and one of them has received a heavy discount.https://www.notebookcheck.net/Google-discontinues-the-Chromecast-with-Google-TV-but-this-Android-TV-4K-streamer-is-on-sale-for-just-24-99.965621.0.html
This device is way out of date. Don't bother.