With the HOLIST Smart Speakers, after installing the Firmware Updates from 14.9. an Amazon Alexa Multiroom system can be set up.
What do I need to set up an Amazon Alexa Multiroom with HOLIST?
You can set up an Alexa Multiroom system with the Smart speakers HOLIST S and HOLIST Min in any combination. An Alexa Multiroom system can consist of two or more devices.
An Alexa Multiroom System can only be set up and managed via the Amazon Alexa app. You need the Alexa app on a smartphone that is running on the same Wi-Fi as your HOLIST speakers and a valid Amazon account.
Note: In the Alexa app, a Multiroom group named "Everywhere" is already predefined and automatically includes all Alexa Multiroom compatible devices.
Where can I get the Amazon Alexa App
Apple/iOS > Download Amazon Alexa App in the App Store
Link Tip Video tutorial (external) > Set up Multiroom with the Alexa App. How does it work?