User's Manual

Preference
11.2 Alarm Sound Duration: The alarm duration. User can
set from 1 to 15 minutes.
11.3 Auto DST update: It will adjust Daylight Saving Time
(DST) automatically based on your idevice time zone
setting. The alarm clock will be automatically one hour
ahead of Standard Time in summer time and will be
back to the normal Standard Time when back to winter
time, according to your idevice’s time zone.
11.4 Tap [Done] to save the setting or Tap [Cancel] to
restore the setting.