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GA-B2100-2ADR
The Casio G-Shock GA-B2100-2ADR updates the iconic octagonal “CasiOak” design with advanced functionality and a sleek blue finish. Inspired by the original G-SHOCK, this model combines retro styling with modern innovations like Tough Solar power and Bluetooth® Smartphone Link, delivering both style and performance.
Built with a Carbon Core Guard structure and resin band, the GA-B2100-2ADR is lightweight at just 52 g yet tough enough for daily wear and outdoor adventures. With 200M water resistance, shock resistance, and essential G-SHOCK features such as World Time, stopwatch, countdown timer, and multiple alarms, it’s designed for all-around reliability.
The double LED Super Illuminator ensures visibility day or night, while solar charging and power-saving features provide up to 18 months of operation on a full charge. Slim at 11.9 mm, this model is as comfortable as it is durable — a perfect balance of fashion, function, and toughness.
Case / bezel material: Carbon / Resin
Resin Band
Mineral Glass
Shock Resistant
Carbon Core Guard structure
200-meter water resistance
Tough Solar (Solar powered)
App connectivity feature
Auto time adjustment
Easy watch setting
Approximately 300 world time cities
Time & place
Reminder
Phone finder
Smartphone Link feature
Mobile link (Wireless linking using Bluetooth®)
World time
World time 38 time zones (38 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 capacity: 00'00''00~59'59''99 (for the first 60 minutes) 1:00'00~23:59'59 (after 60 minutes) Measuring unit: 1/100 second (for the first 60 minutes) 1 second (after 60 minutes) Measuring modes: Elapsed time, lap/split time
Timer
Countdown timer Measuring unit: 1 second Countdown range: 60 minutes Countdown start time setting range: 1 second to 60 minutes (1-second increments and 1-minute increments)
Alarm/hourly time signal
5 daily alarms
Hourly time signal
Light
Double LED light LED light for the face (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow) LED backlight for the digital display (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
Light color
LED:White
Calendar
Full auto-calendar (to year 2099)
Mute feature
Button operation tone on/off
Energy saving feature
Power Saving (display goes blank to save power when the watch is left in the dark)
Battery display/alert
Battery level indicator
Run time
Approx. battery operating time: 7 months on rechargeable battery (operation period with normal use without exposure to light after charge) 18 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)
Accuracy
Accuracy: ±15 seconds per month (with no mobile link function)
Other features
Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.)
12/24-hour format
Date/month display swapping
Day display (days of the week selectable in six languages)
Regular timekeeping: Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (battery level, mode) Digital: Hour, minute, second, pm, month, date, day
Size of Case: 48.5 × 45.4 × 11.9 mm
Total Weight: 52g
