How to Mute Voice Announcements

I need to run the Mova at night but I can't find where to reduce or (preferably) mute the volume. Please advise.

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Hello,you can adjust the volume of the device's voice output:
On the app's home page, click on the connected robot to enter the device settings.
Click the three dots in the top right corner of the device settings page.
Go to "More Features."
Click on "Language and volume" and select the desired language. Drag the slider to adjust the volume of Narrator.
Thank you for your understanding and support.