List Price: 38,500 yen (Japan: GDG-B100-1JF, US: TBA)
Size: Large
Dimensions (L x W x H): 63.6 x 49.6 x 16.2 mm
Weight:Â 66 grams
Module: 3587 (instruction manual at casio.com)
Battery Type (Lifespan): CR2032 (approx. 2 years)
Series Launch Year: 2026
Notable Features: Mud and Dust Resistance, MIP LCD Display, Red Auto LED Backlight, Step Counter, Bluetooth Smartphone Link, World Time, Interval Timer, Stopwatch, Vibration
See full specifications for GDG-B100-1 under “Additional information” tab above.
View the GDG-B100 Launch Page at gshock.casio.com/intl (Asia Region Site)
Note: There is one misleading image on Casio’s official GDG-B100 product pages that shows the watch next to two smartphone screens with one showing Honolulu selected as the “location whose tide graph you wish to display.” The GDG-B100 does not have a tide graph function.
Suggested Uses: Extreme Sports, Fitness, Outdoors, Sports
Latest GDG-B100 News:
Recent GDG-B100 Releases:
(Android Mobile: Press and hold for article link.)
View all GDG-B100 articles on G-Central
GDG-B100 Versus GBD-200
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The GDG-B100 is the first Mudman and the third Master of G model with a high-contrast MIP LCD display. It is essentially a beefed up GBD-200 (with a step tracker and Bluetooth), with a bumper guard design featuring a Carbon Core Guard case, a mud-and-dust-resistant button structure that can be operated with gloves, stronger band connections, and a red-colored LED backlight. Other notable features include vibration alerts, phone notifications, interval timer, and measurement for distance, speed, pace, and calories burned, with distance measuring calibration available with a GPS-equipped smartphone for future offline measurements. The GDG-B100 is an October 2026 release in Japan and Asia, with other regions expected to follow.

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G-SHOCK
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In stock
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Large
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63.6 x 49.6 x 16.2
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66
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200-Meter Water Resistance, Mud Resistant, Shock Resistant
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Carbon Core Guard
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Carbon, Resin, Bio-Based Resin
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Resin, Bio-Based Resin
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Resin, Bio-Based Resin
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Mineral
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CR2032
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2 Years
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Power Save
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Bluetooth Mobile Link
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Step Tracker
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MIP LCD
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Vibration
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Casio Watches
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Auto Summer Time (DST) Switching, Auto Time Correction, Data Update (Time Zone and DST rules), Phone Finder, Phone Notifications, Training Function, Training Log Data Management, World Time (approx. 300 cities)
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Auto Pause, Auto/Manual Lap, Distance, Speed, Pace, Target Alert (time, calories burned), Training Display Customization
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World Time
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38
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38 + UTC
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Auto DST Switching, DST On/Off
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Stopwatch
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1 second
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99:59’59”
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elapsed time, split time
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Auto-repeat, Auto-repeat (1 to 20), Countdown Timer, Intervals (1 to 5)
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1 second
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60 minutes
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1 second to 60 minutes
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1 second
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4 Daily (with Snooze)
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1.5 or 3 Second Afterglow, Auto, LED, Super Illuminator
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Red
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Full Auto Calendar to 2099
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Button Tone On/Off
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12/24-Hour Format
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145 to 215
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Alarm, Countdown Timer, Stopwatch, Training, World Time
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The GBD-200 offers Bluetooth mobile link, a step counter, and advanced training functions in a relatively compact case inspired by the classic square G-Shock shape.

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G-SHOCK
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In stock
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Medium
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48.4 x 45.9 x 15
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58
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200-Meter Water Resistance, Shock Resistant
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Resin
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Resin
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Resin
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Mineral
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CR2032
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2 Years
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Power Save
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Bluetooth Mobile Link
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Step Tracker
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MIP LCD
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Vibration
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Casio Watches
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Auto Summer Time (DST) Switching, Auto Time Correction, Data Update (Time Zone and DST rules), Phone Finder, Phone Notifications, Training Function, Training Log Data Management, World Time (approx. 300 cities)
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Auto Pause, Auto/Manual Lap, Distance, Speed, Pace, Target Alert (time, calories burned), Training Display Customization
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World Time
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38
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38 + UTC
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Auto DST Switching, DST On/Off
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Stopwatch
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1 second
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99:59’59”
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elapsed time, split time
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Auto-repeat, Auto-repeat (1 to 20), Countdown Timer, Intervals (1 to 5)
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1 second
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60 minutes
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1 second to 60 minutes
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1 second
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4 Daily (with Snooze)
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1.5 or 3 Second Afterglow, Auto, LED, Super Illuminator
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White
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Full Auto Calendar to 2099
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Button Tone On/Off
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12/24-Hour Format
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145 to 215
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Alarm, Countdown Timer, Stopwatch, Training, World Time
Some attributes for individual models may differ within a series, such as price, materials, weight, etc. Specs are subject to change and are not guaranteed to be accurate. Prices are USD unless otherwise noted. Follow your country's official G-Shock site (gshock.casio.com) for release announcements and more info. The casio.com/intl site covers the Asia region and not Western countries. Not all models may be released worldwide.
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