G-SHOCK : GA-2100-1A2ER

Housing
Dimensions (LxWxH): 48.5 × 45.4 × 11.8 mm
Material: Carbon/Resin
Water resistance: 20 bar

Watch function
World Time 31 time zones (48 cities + Coordinated Universal Time), Daylight Saving Time on/off
1/100th second stopwatch
Measuring capacity: 00'00''00~59'59''99 (during the first 60 minutes) 1:00'00~23:59'59 (after 60 minutes)
Unit of measurement: 1/100th of a second (during the first 60 minutes) 1 second (after 60 minutes)
Measuring modes: Elapsed time, split time, 1st and 2nd place times

Countdown
Unit of measurement: 1 second
Countdown range: 24 hours
Countdown start time setting range: 1 second to 24 hours (1 second, 1 minute, and 1 hour increments)

5 daily alarms
Hours signal

Double LED lighting
LED dial illumination (Super Illuminator, selectable illumination duration (1.5 or 3 seconds), afterglow)
LED backlight for digital display (Super Illuminator, selectable illumination duration (1.5 or 3 seconds), afterglow)
LED: white

Full automatic calendar (up to year 2099)
Enabling/Disabling Button Tone
Accuracy: ±15 seconds per month
12/24 hour format
Hand hide function (to provide a clear view of the digital display content.)
Standard timekeeping: Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (day) Digital: Hour, minute, second, 12-hour format, month, date

Reference : GA-2100-1A3ER

Warranty : 2 years