Basic information
Power source and battery life
Tough Solar
Smartphone connectivity/app connectivity features
Smartphone connectivity feature
Mobile link (wireless link using Bluetooth®)
Applications
CASIO WATCHES
App Connectivity Feature
Automatic time setting
Easy watch setup
World time for about 300 cities
time and place
Reminder
Phone Finder
Frame size (length x width x height)
48.5 × 45.4 × 11.9 mm
the weight
57 g
Frame and body material
carbon/bioresin
Belt
Bracelet fabric (made from TRACEABLE ORGANIC TRUECOTTON)
Structure
Shock resistance
Carbon Infrastructure Protection
Water resistance
Water resistance up to 200 meters
Exoskeleton
Glass
Mineral glass
Compatible belt size
145 to 215 mm
Other
Neobrite
Watch Features
UTC
World time 38 time zones (38 cities + Coordinated Universal Time), city code display, city name display, daylight saving on/off, automatic switching to daylight saving time (DST), home city/world time city switching
stopwatch
1/100-second stopwatch Measuring capacity: Approx. 00'00''00 to 59'59''99 (first 60 minutes) and approx. 1:00'00 to 23:59'59 (after 60 minutes) Measuring unit: 1/100 second (first 60 minutes) 1 second (after 60 minutes) Measuring modes: Elapsed time, lap/split time
temporary
Countdown timer Unit of measurement: 1 second Countdown range: 60 minutes Countdown start time setting range: 1 second to 60 minutes (1 second increments, 1 minute increments)
Alarm/Hourly Time Signal
5 alarms per day
Hourly time signal
Light
Dual LED Light LED light for watch face (Super bright, selectable illumination duration (1.5 seconds or 3 seconds), Afterglow) LED backlight for digital display (Super bright, selectable illumination duration (1.5 seconds or 3 seconds), Afterglow)
color of light
LED Light: White
calendar
Fully automatic calendar (up to year 2099)
Mute feature
Turn on/off button operation tone
Energy saving feature
Power saving (Display goes blank to save power when the watch is left in a dark area)
Display/alert battery level
Battery level indicator
Runtime
Approximate battery operating time: 7 months for rechargeable battery (operation period with normal use without exposure to light after charging) 18 months for rechargeable battery (operation period when stored in a completely dark place with the power saving feature on after fully charged)
Accuracy
Accuracy: ±15 seconds per month (without mobile link function)
Other features
Hand shift feature (hands move away from the screen so you can see the digital display contents without any obstruction).
12/24 hour format
Toggle date/month display
Day display (selectable days of the week in 6 languages)
Regular timekeeping: Analog: 2 hands (hours, minutes (hand moves every 20 seconds)), 1 dial (battery level, mode) Digital: Hours, minutes, seconds, pm, month, date, day
Introducing the eco-friendly G-SHOCK lineup just like you like it, made with renewable materials and focused on sustainability. We start with the GA-B2100, which packs practical functions like Smartphone Link and a Tough Solar charging system while maintaining the GA-2100’s signature octagonal shape. We then craft key resin components using bio-resin, which is produced from renewable organic resources and is expected to help reduce CO2 emissions and minimize environmental impact. Our focus on nature is then further enhanced with our very special fabric bands, featuring the work of two innovative companies—TRUECOTTON and FOOD TEXTILE—to reduce waste and promote ethical sourcing. The fabric of the bands is made from TRUECOTTON organic material, which is traceable to the farm and spinning mill where the fabric came from. This not only helps manage environmental impact, but also ensures worker protection and high-quality craftsmanship throughout the production process. The bands are colored with dyes from FOOD TEXTILE, a project that reuses food that would otherwise be thrown away to create natural dyes. Light, earthy colors are renewed with dyes made from over 90% natural materials. The dark brown color of the GA-B2100CT-1A5 watch band comes from a coffee-derived dye, while the khaki gray color of the GA-B2100CT-5A watch band comes from a dye extracted from the Echinacea plant. Materials that would otherwise be thrown away are renewed in a beautiful new form, a sustainable and environmentally friendly watch.
