Update the retro look you love with the octagonal GA-2100, which inherits the design concept of the first G-SHOCKs, now with smartphone connection and Tough Solar power.
Case dimensions (H x W x D)
48.5 × 45.4 × 11.9 mm
Weight
52 g
Case and bezel material
carbon/resin
Strap
Resin strap
Structure
Resistant shockproof
Carbon Core Guard structure
Waterproof
Waterproof up to 20 bar
Power and battery life
< div>Tough Solar (solar powered)
Smartphone connection function
Mobile Link (wireless connection via Bluetooth®)
App
< div>CASIO WATCHES
App connection function
Automatic clock adjustment
Easy clock setting
World time around 300 cities
Time and location
Reminders
Find phone
Glass
Mineral glass
Miscellaneous
Neobrite
World time
World time
38 time zones (38 cities + Coordinated Universal Time), city code display, city name display, daylight saving time on/off, automatic daylight saving time (DST) switching, home city switching time zone/world time
Stopwatch
Hundredths of a second stopwatch
Measuring Capability:
00’00”00~59’59”99 (for the first 60 minutes)
1:00’00~23:59’59 (after 60 minutes)
Unit of measurement:
1 hundredth of a second (for the first 60 minutes)
1 second (after 60 minutes)
Measurement mode: elapsed time, split/lap time
Timer
Countdown timer
Unit of measurement: 1 second
Countdown interval: 60 minutes
Countdown start time setting range: 1 second to 60 minutes (1 second increments and 1 minute increments)
Sound Reminder / Time Signal
5 reminders daily sounds
Hourly signal
Light
Double LED light
LED light for the dial (Super Illuminator, selectable illumination duration (1.5 seconds or 3 seconds), luminescence)
LED backlight for the digital display (Super Illuminator, selectable illumination duration (1.5 seconds or 3 seconds), luminescence)
Light color
LED: white
< h2>Calendar
Full automatic calendar (up to the year 2099)
Muting the volume
Enabling/disabling the button press sound
Energy saving function
Energy saving (display turns off to save energy when the watch is left in the dark)
Battery status display/alertBattery level indicator
Ride timing
Approximate battery run time:
7 months with rechargeable battery (operation period for normal use without exposure to light after charging)
18 months with rechargeable battery (operating period when stored in total darkness with the energy saving function activated after a full charge)
Accuracy
Accuracy: ±15 seconds per month (without Mobile Link function)
Other features
Hand shifting function (the hands move so as not to block the display of the contents of the digital display).
Day display (days of the week selectable in six languages)
Regular time display:
Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (battery level, mode)
Digital: hour, minute, second, pm, month, date, day
GA-B2100-2A
Case dimensions (H x W x D)
48.5 × 45.4 × 11.9 mm
Weight
52 g
Case and bezel material
carbon/resin
Strap
Resin strap
Structure
Resistant shockproof
Carbon Core Guard structure
Waterproof
Waterproof up to 20 bar
Power and battery life
< div>Tough Solar (solar powered)
Smartphone connection function
Mobile Link (wireless connection via Bluetooth®)
App
< div>CASIO WATCHES
App connection function
Automatic clock adjustment
Easy clock setting
World time around 300 cities
Time and location
Reminders
Find phone
Glass
Mineral glass
Miscellaneous
Neobrite
World time
World time
38 time zones (38 cities + Coordinated Universal Time), city code display, city name display, daylight saving time on/off, automatic daylight saving time (DST) switching, home city switching time zone/world time
Stopwatch
Hundredths of a second stopwatch
Measuring Capability:
00’00”00~59’59”99 (for the first 60 minutes)
1:00’00~23:59’59 (after 60 minutes)
Unit of measurement:
1 hundredth of a second (for the first 60 minutes)
1 second (after 60 minutes)
Measurement mode: elapsed time, split/lap time
Timer
Countdown timer
Unit of measurement: 1 second
Countdown interval: 60 minutes
Countdown start time setting range: 1 second to 60 minutes (1 second increments and 1 minute increments)
Sound Reminder / Time Signal
5 reminders daily sounds
Hourly signal
Light
Double LED light
LED light for the dial (Super Illuminator, selectable illumination duration (1.5 seconds or 3 seconds), luminescence)
LED backlight for the digital display (Super Illuminator, selectable illumination duration (1.5 seconds or 3 seconds), luminescence)
Light color
LED: white
< h2>Calendar
Full automatic calendar (up to the year 2099)
Muting the volume
Enabling/disabling the button press sound
Energy saving function
Energy saving (display turns off to save energy when the watch is left in the dark)
Battery status display/alertBattery level indicator
Ride timing
Approximate battery run time:
7 months with rechargeable battery (operation period for normal use without exposure to light after charging)
18 months with rechargeable battery (operating period when stored in total darkness with the energy saving function activated after a full charge)
Accuracy
Accuracy: ±15 seconds per month (without Mobile Link function)
Other features
Hand shifting function (the hands move so as not to block the display of the contents of the digital display).
Day display (days of the week selectable in six languages)
Regular time display:
Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (battery level, mode)
Digital: hour, minute, second, pm, month, date, day
GA-B2100-2A