Brand: Casio G-Shock
Model: GA-B2100-1A1
Nickname: CasiOak
Gender: Men's
Case Size: 48.5 × 45.4 × 11.9 mm
Weight: 52g
Case / Bezel Material: Carbon / Resin
Band Material: Resin
Construction: Shock Resistant + Carbon Core Guard Structure
Crystal: Mineral Glass + Neobrite
Power: Tough Solar (Solar powered)
Bluetooth: Mobile link via CASIO WATCHES app — auto time adjustment, ~300 world-time cities, reminder, phone finder
World Time: 38 time zones (38 cities + UTC), DST on/off, auto DST switching, city swap
Display: Ana-Digi with hand shift feature
Stopwatch: 1/100-sec (first 60 min), 1-sec (after 60 min), elapsed/lap/split
Countdown Timer: 1 sec to 60 minutes
Alarms: 5 daily alarms + Hourly time signal
Backlight: Double Super Illuminator LED (White) for face & display, 1.5/3-sec selectable + afterglow
Power Saving: Display blanks in darkness
Battery Runtime: ~7 months normal use / ~18 months power save mode
Calendar: Full auto-calendar (to 2099)
Time Format: 12/24-hour
Accuracy: ±15 seconds/month
Water Resistance: 200 Meters
Warranty: 1 Year