Casio G-Shock [GMA-S2100-4ADR]

This series downsizes the GA-2100 to create a simple and slim design.
The octagonal bezel, flat face, simple bar hour markers, and carbon core guard structure that are distinctive features of the GA-2100 are now available in a compact configuration.

Size of case / Total weight

• Size of case : 46.2×42.9×11.2mm

• Total weight : 41g

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