Iron ore from the earth encounters a furnace and is made into steel, and that steel is forged and molded into a metal bezel that defines the rugged style and performance of the GA2100 series. The GA2100 series has continued to increase in popularity. Designed to be slim and compact, the GA2100 series delivers top performance and style without sacrifice. The silver-colored metal of the G-SHOCK GM2100-1A watch bezel is more than dramatic window dressing: it’s the protective capstone that presides over the feat of engineering and innovation that is the GA2100.

The beauty of the stainless steel is undergirded by the resin case, delivering G-SHOCK’s famous shock resistance. The GM2100-1A is also 200m water resistant (wr 20 bar), and that complements the stainless steel bezel which is corrosion resistant.

The textured black resin band provides style and comfort, highlighting the metal bezel. The texture in the black band demonstrates our attention to detail, and the dial receives that same attention. A metallic vapor deposition on the dial provides the beautiful finish and allows expression of minute details.

A double LED light ensures the watch can be easily read in the dark. A Super Illuminator LED illuminates the face, while another Super Illuminator LED provides a backlight for the digital display.

Case size (L× W× H)

49.3 × 44.4 × 11.8 mm
Weight

72 g
Case and bezel material

Resin / Stainless steel
Band

Resin Band
Construction

Shock Resistant
Water resistance

200-meter water resistance
Power supply and battery life

Approx. battery life: 3 years on SR726W X 2

World time

World time 31 time zones (48 cities + coordinated universal time), daylight saving on/off
Stopwatch

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
Timer

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)
Alarm/hourly time signal

5 daily alarms

Hourly time signal
Light

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)
Light color

LED:White
Calendar

Full auto-calendar (to year 2099)
Mute feature

Button operation tone on/off
Accuracy

Accuracy: ±15 seconds per month
Other features

12/24-hour format

Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.)

Regular timekeeping: Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (day) Digital: Hour, minute, second, pm, month, date