Question about Google Chromecast Ultra EU Version

So: I bought the product in November 2019. The set includes the Google Chromecast (the thing is relatively small, diameter approx. 5.5 cm) with integrated HDMI plug and 1 power supply unit (with a Euro plug). Contrary to other statements: The power plug has an integrated RJ45 socket (only the Ultra version), which can be used to connect to LAN.