How to set up multi-room audio with Amazon Alexa - Reviewed
Alexa: Multiroom-Funktion für Amazon Echo einrichten
Amazon expands Echo multi-room audio feature w/ support for Spotify - 9to5Mac
Amazon Echo devices now support multi-room audio playback | AFTVnews
How to play music on all your Amazon Echo speakers at once | TechHive
WiiM Mini Streamer Audio AirPlay 2 Receiver HiFi Wireless, Multiroom Stereo, Vorverstärker, funktioniert mit Alexa und Siri Sprachassistenten, Streaming Hi-Res Audio von Spotify, Amazon Music und mehr : Amazon.de: Elektronik & Foto