Go bold with the GA-2100-1A1DR — where stealth design meets everyday durability.
Clean, tactical, and unmistakably modern, the GA-2100-1A1DR delivers the iconic octagonal G-SHOCK profile in a full matte black finish. With its minimalist blackout dial and ultra-slim carbon-reinforced case, this model blends street-ready style with legendary toughness. Engineered with Carbon Core Guard technology, it offers lightweight comfort without compromising shock resistance — making it the perfect daily wear for those who move with confidence.
Dial: Matte black finish with blackout indices and subtle tonal detailing
Case Diameter (L × W × H) MM: 48.5 × 45.4 × 11.8
Case Material: Carbon-reinforced resin (Carbon Core Guard structure)
Bracelet: Resin band (Black)
Construction: Shock resistant, Carbon Core Guard structure
Power supply and battery life: Approx. 3 years on SR726W × 2
Glass: Mineral glass
Gender: Men / Unisex
Water-Resistance: 200-meter water resistance
World Time: 31 time zones (48 cities + coordinated universal time), daylight saving on/off, home city/world time city swapping
Watch Features
Stopwatch:
1/100-second stopwatch
Measuring capacity:
00'00''00~59'59''99 (first 60 minutes)
1:00'00~23:59'59 (after 60 minutes)
Measuring modes: Elapsed time, split time
Timer:
Countdown timer
Measuring unit: 1 second
Countdown range: 24 hours
Countdown start time setting range: 1 second to 24 hours (1-second/1-minute increments)
Alarm/hourly time signal:
5 daily alarms
Hourly time signal
Light:
Double LED light
Selectable illumination duration (1.5 seconds or 3 seconds), afterglow
Light color: LED: White
Calendar: Full auto-calendar (to year 2099)
Mute feature: Button operation tone on/off
Accuracy: ±15 seconds per month
Other features:
Hand shift feature (hands move out of the way to provide an unobstructed view of digital display contents)
12/24-hour format
Regular timekeeping:
Analog: 2 hands (hour, minute – hand moves every 20 seconds)
Digital: Hour, minute, second, am/pm, month, date, day
