The G-Shock GA-2100VB-1AER men's watch is a Casio model made with a resin case and strap (dimensions 48.5mm x 45.4mm x 11.8mm) and mineral glass that protects an analog-digital dial. Waterproof up to 20 atm.

- Mineral Glass
- Shock Resistant
- 200-meter water resistance
- Case / bezel material: Resin
- Resin Band
- LED light (Super illuminator)
Selectable illumination duration (1.5 seconds or 3 seconds), afterglow
- World time
31 time zones (48 cities + coordinated universal time), daylight saving on/off, Home city/World time city swapping
- 1/100-second stopwatch
Measuring capacity: 23:59'59.99''
Measuring modes: Elapsed time, split time, 1st-2nd place times
Others: target time alarm, direct timing start from the timekeeping mode
- Countdown timer
Measuring unit: 1/10 second
Countdown range: 60 minutes
Countdown start time setting range: 1 to 60 minutes (1-minute increments)
- 5 daily alarms (with 1 snooze alarm)
- Hourly time signal
- Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.)
- Full auto-calendar (to year 2099)
- 12/24-hour format
- Button operation tone on/off
- Regular timekeeping
Analog: 2 hands (hour, minute (hand moves every 20 seconds))
Digital: Hour, minute, second, pm, month, date, day
- Accuracy: ±15 seconds per month
- Approx. battery life: 5 years on CR2016
- LED:White