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The G-Shock GMD-B800 is an affordable G-SQUAD fitness model with a step counter and Bluetooth smartphone link that is smaller than the standard GBD-800. Some advantages over the similar GBA-B800 analog-digital series include a longer battery lifespan and a larger LCD display.


Bluetooth Step Counter


List Price: $99 (GMDB800-4)

Size: Small
Dimensions (L x W x H): 50.7 x 45.2 x 15.5 mm
Weight: 52 grams
Module: 3486 (instruction manual at casio.com)
Battery Type (Lifespan): CR2025 (approx. 3 years)
Series Launch Year: 2020

Notable Features: Step Counter, Bluetooth Mobile Link, 1/100-Second Stopwach with 200-Lap Memory, Interval Timer, 5 Daily Alarms, Auto LED Light

See full specifications for GMDB800-4 under “Additional information” tab above.

Suggested Uses: Fitness, Outdoors, Sports

GMDB800 on Amazon GMDB800 on eBay GMDB800-4 at Casio
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GMDB800 on Amazon GMDB800 on eBay GMDB800-4 at Casio
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Some specifications (price, materials, weight, Neobrite, etc.) for individual models may vary within a series. Some models may not be available in all countries. Visit the linked articles in gallery images for more info on specific models.
About The Specs Catalog | Features Glossary | Specs Home

Specification: G-SHOCK GMD-B800


Dimensions (L x W x H mm)

50.7 x 45.2 x 15.5

Weight (g)




Case Material

Bezel Material

Band Material





Battery Life (Approx.)

Low Battery Alert


Smartphone App

Bluetooth Functions

Alarm Settings, Auto Summer Time (DST) Switching, Auto Time Correction, One-Touch Time Correction, Phone Finder, Step Count Data Transfer, Stopwatch Data Transfer, Timer Settings, World Time (approx. 300 cities)

World Time



, ,

Stopwatch Unit


Stopwatch Max Range

Measuring Modes

cumulative time, elapsed time, lap times, split time

Countdown Timer

, , , ,

Countdown Timer Unit

1 second

Countdown Range

Countdown Setting Range

Countdown Setting Increment (Lowest)

1 second


Hourly Time Signal

Hourly Time Signal

Light Type

, , ,

Light Color



Full Auto Calendar to 2099

Button Tone On/Off

Button Tone On/Off

12/24-Hour Format

12/24-Hour Format

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