G-SHOCK G-STEEL WATCH, Blue Dial, 44mm - GBM-2100A-2BER

Sleek and sophisticated, modern and bold — the metal-bezel GBM-2100 combines Smartphone Link and Tough Solar charging, all in a compact form factor.
The main resin components used in the case and strap are made from bio-based resin.
Choose your favorite color combination from the vapor deposition finishes: the GBM-2100A-2B with a blue dial and silver-tone indexes, the GBM-2100A-4B with a burgundy dial and silver-tone indexes, or the GBM-2100A-8B with a light gold-tone dial and black indexes.
Durable construction and fashionable design in a watch that easily takes you from casual settings to business meetings.
News September 2025

Special Features
Shock resistant
Waterproof up to 20 bar
Stable solar energy
Easy to use via smartphone
Visible in the dark

Specifications
Basic information
Case dimensions (H x W x D) 49.3 × 44.4 × 11.9 mm
Weight 72 g
Case and bezel material Bio-based resin/Stainless steel
Bio-based resin strap
Shock-resistant structure
Water resistance Waterproof up to 20 bar
Bluetooth time adjustment: Connects to a smartphone and automatically adjusts the time
Tough Solar Power and Battery Life

Smartphone and app connection function
Mobile Link (wireless connection via Bluetooth®)
CASIO WATCHES App
App connection function Automatic clock adjustment, Easy clock setting, World time for about 300 cities, Time and location, Reminder, Find phone

External
Mineral glass
Adjustable strap From 145 to 215 mm
Various Neobrite

Watch Features
International Time
38 time zones (38 cities + Coordinated Universal Time), automatic daylight saving time (DST), home time/world time city switching
Hundredths of a second stopwatch
Measuring capacity:
00'00''00~59'59''99 (for the first 60 minutes)
1:00'00~23:59'59 (after 60 minutes)
Unit of measurement:
1/100th of a second (for the first 60 minutes)
1 second (after 60 minutes)
Measurement modes: elapsed time, split/lap time
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 / Hourly signal: 5 daily sound reminders, Hourly signal
Double LED light
LED dial light (Super Illuminator, selectable illumination duration (1.5 seconds or 3 seconds), luminescence)
LED backlight for digital display (Super Illuminator, selectable illumination duration (1.5 seconds or 3 seconds), luminescence)
Light color
LED: white
Full automatic calendar (up to the year 2099)
Volume mute Button press beep on/off
Power saving function (display turns off to save power when the watch is left in the dark)
Battery status display/warning: Battery level indicator
Race timing
Approximate battery operating time:
7 months with rechargeable battery (operating period for normal use without exposure to light after charging)
18 months with rechargeable battery (operating time when stored in total darkness with the power saving function activated after a full charge)
Accuracy: ±15 seconds per month (without Mobile Link function)

Other features
Hand movement function (the hands move so as not to block the view of the digital display contents).
12/24 hour format
Date/Month Display Switching
Day view (selectable days of the week in six languages)
Regular time indication:
Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (battery level, mode)
Digital: hour, minute, second, pm, month, date, day of the month