G-Shock MRG-8100B-1A - Manual (Page 84)

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Countdown Timer: Setting Unit: 1 minute
Measurement Range: 24 hours
Countdown Unit: 1 second
Beeper: 10 seconds
Auto switching to elapsed time measurement
(1-second units) when the end of a countdown
timer operation is reached
World Time: Current time in 29 cities (29 time zones) around the
globe, summer time, Home City
Alarm: Setting Units: Hour, minute
Beeper: 10 seconds
Other: Auto hand home position adjustment; auto return to regular
timekeeping; Power Saving
Main Element: Tuning fork type high-performance quartz oscillator;
one-chip CMOS-LSI
Battery: Rechargeable battery
Battery Operating Time: 5 months
(no exposure to light; 10 seconds alarm
beeper operation and one signal reception
of approximately 4 minutes per day)