How do I turn the Citation Oasis microphone ON or OFF?

On the back of the unit is a slide switch that allows you to mute the microphone. When the microphone is muted, the orange LED lights up on the front of the Citation Oasis indicate that the microphone is off and that the Google Assistant can no longer be called at that moment. The Google Assistant can then also not unwittingly listen in.

Turning off the Assistant via the Google Home app

You can also set times via the Google Home app via Digital Wellbeing when the Google Assistant can be called.