Casio G-Shock Black GD100-1B Watch
Casio G-Shock Black GD100-1B Watch
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A model equipped with a high-brightness LED backlight from G-SHOCK, which continues to evolve in the pursuit of toughness. Use of a high-brightness LED system and a light guide plate makes the watch easy to read even in the dark. It also has practical functions such as world time, an alarm, and a stopwatch. The color is classic G-SHOCK black, and the brand-color red is used as an accent throughout.
G-Shock GD100-1B
A big, blacked-out digital build that runs for years. A bold full-digital display, a backlight that flashes on every alarm, multi-time tracking for four cities at once, and a 7-year battery so you can set it and forget it.
Build & Fit
Case size (L x W x H)
55 x 51.2 x 17.4 mm
Weight
72 g
Case & bezel
Resin
Band
Resin band
Construction
Shock resistant
Glass
Mineral glass
Display & Power
Display
Full digital, bold layout
Light
White LED backlightAuto switch, selectable duration, afterglow.
Flash alert
Backlight strobes with the buzzerFires on alarms, hourly signal, and timer time-up.
Battery
About 7 years on CR2025
Accuracy
Plus or minus 15 sec / month
Calendar
Full auto-calendar to 2099
Timekeeping & Tools
Multi Time
Track 4 cities at once
World time
31 zones, 48 cities, DSTSwap your home and world time cities on the fly.
Stopwatch
1/100 sec, up to 23:59'59.99"Elapsed, split, and 1st-2nd place times.
Countdown timer
1 sec to 24 hours, 1/10 sec unit
Alarms
5 alarms (daily or one-time), hourly signal
Mute
Button operation tone on/off
Format
12/24-hour, hour, min, sec, date, day
Specifications reflect the GD100-1B as listed by the manufacturer.
