Casio G-Shock GMA-S2100-1A / GMA-S2100-4A / GMA-S2100-4A2 / GMA-S2100-7A

Specifications:
-Case / bezel material: Carbon / Resin　
-Resin Band
-Mineral Glass
-Neobrite
-Shock Resistant
-Carbon Core Guard structure
-200-meter water resistance
-Double LED light
-LED light for the face (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
-LED backlight for the digital display (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
-World time
-31 time zones (48 cities + coordinated universal time), daylight saving on/off
-1/100-second stopwatch

Measuring capacity:

-00'00''00~59'59''99 (for the first 60 minutes)
1:00'00''~23:59'59'' (after 60 minutes)

Measuring unit:
1/100 second (for the first 60 minutes)
1 second (after 60 minutes)
Measuring modes: Elapsed time, split time, 1st-2nd place times
Countdown timer
Measuring unit: 1 second
Countdown range: 24 hours
Countdown start time setting range: 1 second to 24 hours (1-second increments, 1-minute increments and 1-hour increments)
5 daily alarms
Hourly time signal
Hand shift feature
Full auto-calendar (to year 2099)
12/24-hour format
Button operation tone on/off
Regular timekeeping
Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (day)
Digital: Hour, minute, second, pm, month, date
Accuracy: ±15 seconds per month
Approx. battery life: 3 years on SR726W × 2