Designed with a slimmer and more compact design this G-SHOCK model GMAS2100RB-1A is the midsize version of the iconic GMA-S2100 with the octagon bezel. The black and deep red colour scheme, with a glossy metallic finish gives the watch a touch of sophistication.

- 46.2×42.9×11.2mm Case Size
- Carbon/Resin Case and Bezel
- Resin Band
- Carbon Core Guard Structure
- Shock Resistant
- Mineral Glass
- 200 Meters Water Resistant
- LED: White, double LED light
- World time - 31 time zones (48 cities + coordinated universal time daylight saving on/off)
- Stopwatch
- Timer
- Alarms: 5 daily alarms
- Calendar: Full auto-calendar (to year 2099)
- Mute feature: Button operation tone on/off
- 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, day
- Accuracy: ±15 seconds per month
- Approx. battery life: 3 years on SR726W x 2