3PLUS Callie Owner's Manual page 41

Brightness
Set the watch's screen brightness by
tapping on the different sections to
increase or decrease the brightness.
Do not Disturb Mode
Silence all your notifications and
features that use vibrations. This
does not turn off the Bluetooth
connection between your watch and
the app. When the icon is white, this
mode is ON. When the icon is grey,
this mode is OFF.
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