The Casio G-SHOCK GA-2100CM-5ADR is a rugged analog-digital watch from the iconic GA-2100 Series, featuring a distinctive beige camouflage design and G-SHOCK’s slim octagonal case profile. Built with a Carbon Core Guard structure, the watch combines carbon and bio-based resin materials for a lightweight yet durable construction. It offers shock resistance, 200-meter water resistance, world time, stopwatch, countdown timer, multiple alarms, and Super Illuminator double LED lighting, making it suitable for everyday wear, outdoor activities, and active lifestyles. Official specifications are based on Casio’s GA-2100CM-5A product documentation.
Key Features
Analog-digital display
Beige camouflage design
Shock-resistant construction
Carbon Core Guard structure
200-meter water resistance
Carbon and bio-based resin case and bezel
Bio-based resin band
Mineral glass
Neobrite
World time
1/100-second stopwatch
24-hour countdown timer
5 daily alarms
Hourly time signal
Double LED Super Illuminator
Full auto-calendar to 2099
Hand shift feature
12/24-hour time format
Case & Bezel
Case and bezel material: Carbon / Bio-based resin
Carbon Core Guard structure
Shock-resistant construction
Iconic octagonal GA-2100 case design
Camouflage-pattern exterior
Mineral glass
Neobrite
Compatible wrist size: 145–215 mm
Dial & Display
Analog-digital display
Analog display: 2 hands for hour and minute
Minute hand moves every 20 seconds
1 dial for day indication
Digital display: Hour, minute, second, PM, month, and date
Hand shift feature for an unobstructed view of the digital display
12/24-hour time format
Band
Bio-based resin band
Lightweight and durable construction
Compatible wrist size: 145–215 mm
Water Resistance
200-meter water resistance
Rated to 20 bar
Timekeeping & World Time
World time across 31 time zones
48 cities + Coordinated Universal Time (UTC)
Daylight Saving Time on/off
Full auto-calendar to year 2099
12/24-hour time format
Accuracy: ±15 seconds per month
Stopwatch & Timer
1/100-second stopwatch
Measuring capacity up to 23 hours, 59 minutes, 59 seconds
Elapsed time measurement
Split time measurement
1st and 2nd place times
Countdown timer with 1-second measuring unit
Countdown range: Up to 24 hours
Start time can be set from 1 second to 24 hours
Alarm & Additional Functions
5 daily alarms
Hourly time signal
Button operation tone on/off
Hand shift feature
Full auto-calendar
12/24-hour format
Illumination
Double LED light
Super Illuminator for the analog face
LED backlight for the digital display
Selectable illumination duration: 1.5 or 3 seconds
Afterglow
White LED light
Power & Battery
Battery-powered quartz movement
2 × SR726W batteries
Approximate battery life: 3 years
Dimensions & Weight
Case Size: 48.5 × 45.4 × 11.8 mm
Weight: Approximately 51 g
Ideal For
Suitable for:
Everyday wear
Casual and streetwear styling
Outdoor activities
Sports and active lifestyles
Travel
G-SHOCK collectors
Users looking for a lightweight, shock-resistant analog-digital watch
