Dont buy google chromecast for audio if you want multiple speakers connected. They lost patent fight in court room and now you can't change volume of group of speakers. You cumbersome have to change volume for each speaker. It's completely useless now if you want to build music system for the home. In fact we need class action against google for removing essential features after purchase. Btw, all the comments below about errors, speakers suddenly don't play, etc are correct.