Devices must be connected to the same network and they must be allowed to connect through TCP/7447 Port in order to play sync content properly.
More information about synchronization is here.
Check the "Sync room" option from content detail page.
Click here to learn more about creating sync-content.
Go to "Shops" page.
Select the shop that you want to display synchronized content.
Click "Devices" tab.
Make sure you choose a device as an orchestrator.
Learn more about orchestrator here.
Check the flowchart below to see on which conditions we support offline synchronization.