Questions about Geneva Acustica Lounge

Apparently: "Power consumption (standby): 0.50 W".

According to the information provided by the supplier, "the Acustica lounge radio has no built-in battery and only works with a power cord. There is no built-in battery, so this is quite normal. As for the Chromecast, it attaches to your traditional speakers or another non-smart device, and that allows the speakers to stream music and audio wirelessly from different devices. In this case, if you buy this: Google Chromecast Audio (Google Assistant) and connect it to the Acustica Salon Radio, it will have the ability to listen to music streamed from smartphones. For more information you can watch this video: https://www.youtube.com/watch?v=rlnuLAVG2hE