What a timepiece to brighten up your summer with its vibrant colour scheme. G-SHOCK model GMAS2100BS-4A features a flat dial with it inherit octagon shape from original G-SHOCK model DW-5000. With simple bar indexes, each element adding a touch of colour and vibrancy to shine through the sunniest time of year.

- 46.2 × 42.9 × 11.2mm Case Size
- 41g Weight
- Carbon/Resin Case and Bezel 　
- Resin Band
- Shock Resistant
- Carbon Core Guard structure
- 200 Meters Water Resistant
- Approx. battery life: 3 years on SR726W X 2
- Mineral Glass
- World time: 31 time zones (48 cities + coordinated universal time), daylight saving on/off
- Stopwatch
- Timer
- Alarm/hourly time signal
- Double LED light
- Calendar: Full auto-calendar (to year 2099)
- Mute feature: Button operation tone on/off
- 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