Once you’ve updated to the newest firmware, you’ll see the pairing icon on the app screen. Click the icon and then you’ll see your main speaker in the middle of the screen. Next, you can drag and drop another speaker, adding up to 8. Under the “Double” option, you’ll see “Volume Sync” which syncs your speakers to your main speaker’s volume. You can also choose “Stereo” and balance a left and right speaker for a stereo experience.