Harman /Kardon Citation Oasis Manual Del Usuario página 12

Set FM as an alarm
Press and hold (> 5s): Use FM for all alarms;
Press and hold (> 5s) again: Restore the default alarm tone.
Change alarm volume
1. Make sure that your mobile device or tablet is connected to the same Wi-Fi as the Citation Oasis.
2. Launch the Google Home app .
3. Select the Citation Oasis.
4. At the top right, tap Settings
5. Move the slider to adjust the volume.
Note:
When FM is set as alarms, the alarm volume is the same as the system playback volume.
Alarms & Timers.