- GA2100-4A Mono Red Watch from G-Shock.
- Shock & magnetic resistant.
- 200M Water Resistant.
- Analog and digital time display.
- Hourly Time Signal.
- 1/1000 Second Stopwatch.
- LED Light with auto light switch.
- World Time with 29 times zones.
- 5 Daily Alarms and 1 Snooze Alarm.
- Measuring capacity: 99:59'59.999".
- Measuring modes: elapsed time, split time.
- Countdown timer range: 24 hours.
- Full Auto-Calendar (pre-programmed until the year 2099).
- 12/24 Hour Formats.
- Accuracy: +/- 15 seconds per month.
- Battery: CR1220.
- Approx. battery life: 2 years.
- Size: 55 X 51.2 X 16.9mm.