Power supply and battery life: Tough Solar (Solar powered)
World time: 31 time zones (48 cities + coordinated universal time), city code display, city name display, daylight saving on/off, auto summer time (DST) switching, Home city/World time city swapping
Stopwatch: 1/100-second stopwatch | Measuring modes: Elapsed time, lap/split time
Alarm/hourly time signal: 5 daily alarms | Hourly time signal
Timer: Countdown timer
Light: Double LED light | LED: White
Calendar: Full auto-calendar (to year 2099)
Smartphone Link feature: Mobile link (Wireless linking using Bluetooth®)
Apps: Casio Watches
App connectivity feature: Auto time adjustment, Easy watch setting, Approximately 300 world time cities, Time & place, Reminder, Phone finder
Features: Mute feature, Power Saving (display goes blank to save power when the watch is left in the dark), Battery level indicator, 12/24-hour format
Case size (L× W× H): 48.5 × 45.4 × 11.9 mm
Watch Size Chart
Ratings & Reviews of Casio G-Shock GA-B2100-2ADR Analog-Digital Men's Watch