Seiko CAL. H021 Instructions Manual page 19

ALARM ENGAGEMENT/DISENGAGEMENT
A
Press to show ALARM–1 or ALARM–2 mode.
▼
C
With each press, alarm is alternately engaged and disengaged.
[Alarm engaged]
* Alarms ring at the designated time for 20 seconds.
To stop them manually, press any one of the four buttons.
* See *10 on page 25.
C
"on" mark
[Alarm disengaged]
C
"off" mark
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