After powering up each unit, please wait for each unit to beep.
After you hear beeps from each of the products in question, you can press the "OK" button via the edelkrone app to pair the products via Bluetooth.
IMPORTANT: if you press the "OK" button before hearing each unit's connection indicator (the beep), the edelkrone app will not recognize the remaining units to pair the products together.
If the app does not combine one of the devices after you've heard the beep sounds emitted from your unit, please power cycle each device and terminate the edelkrone application to restart the process again.
Related article(s): What products can the edelkrone app control via my iPhone or Android smartphone?