Sage the Combi Wave 3 in 1 Guide Rapide page 18

Minutes now flash to show they can be
adjusted. Turn TIME dial to adjust minutes
and press START button to confirm.
NOTE
If you forget to press START button to confirm
hours or minutes, after 1 minute, the microwave
will automatically cancel your selection.
18
SETTING THE BEEP VOLUME
This allows you to choose the beep volume of
your microwave oven.
Press the BEEP VOLUME button The default
beep volume is set to LOW.
Turn the TIME dial
LOW, MEDIUM and HIGH volume. Each
selection will sound the beep volume selected.
to toggle between