Casio G-Shock World Time Alarm GA-100-1A2 GA-100 Men's Watch
The Casio G-Shock GA-100-1A2 is a bold, highly functional timepiece built for durability and precision under extreme conditions. Engineered with G-Shock’s signature shock and magnetic resistance, it features both analog and digital displays, offering a versatile timekeeping experience. The watch includes world time across 29 time zones, a 1/1000-second stopwatch with speed and distance measurement, a Mach speed indicator, and a countdown timer ranging from 1 minute to 24 hours. It also provides five daily alarms, a snooze alarm, an hourly time signal, and a full auto-calendar valid through 2099. The LED light with afterglow and auto light switch ensures visibility in low light, while its 12/24-hour format adds flexibility. Housed in a rugged 55mm case, the GA-100-1A2 is powered by a CR1220 battery with an approximate two-year life and offers ±15 seconds per month accuracy. Combining sport-ready toughness with multi-functionality, it's ideal for active lifestyles and global travelers alike.
Features:
Shock resistant (G-SHOCK)
Magnetic resistant
LED light
Auto light switch, selectable illumination duration, afterglow
World time
29 time zones (48 cities + coordinated universal time), daylight saving on/off, Home city / World time city swapping
1/1000-second stopwatch
Measuring capacity 9959'59.999''
Measuring modes Elapsed time, lap time, split time
Others Speed (0 to 1998 units / hour), Distance input (0.0 to 99.9)
Mach indicator (speed exceeding 1225 units / hour)
Countdown timer
Measuring unit 1 second
Input range 1 minute to 24 hours (1-minute increments and 1-hour increments)
Other Auto-repeat
Daily alarms
5 independent daily alarms (4 one-time alarms and 1 snooze alarm)
Hourly time signal
Full auto-calendar (to year 2099)
12/24-hour format
Regular timekeeping
Analog 2 hands (hour, minute (hand moves every 20 seconds)
Digital Hour, minute, second, pm, month, date, day
Accuracy ±15 seconds per month
Approx. battery life 2 years on CR1220
Size of case / total weight: 55.0 X 51.2 X 16.9 mm / 70 g