The G-SHOCK GBD-300-9 from the G-SQUAD series is built with practical workout functionality including an accelerometer, distance tracking, Auto Lap, and Smartphone Link connectivity. Its shock-resistant construction features the slimmest profile in the G-SQUAD lineup, complemented by a soft bio-based resin band with 5 mm hole spacing for precise sizing.

Equipped with a high-resolution Memory-in-Pixel (MIP) LCD and Super Illuminator auto-light, the display ensures optimal visibility during day or night training sessions. Bluetooth connectivity enables distance calibration using smartphone GPS, automatic time adjustment, activity tracking via the CASIO WATCHES app, and vibration alerts for milestones and notifications.

Engineered for endurance and everyday activity, the watch delivers 200-meter water resistance and runs for approximately 2 years on a CR2032 battery.

Key Features

Case size (L× W× H)	48.9 × 47.4 × 14.9 mm
Weight	60 g
Case and bezel material	Resin / Bio-based resin
Band	Bio-based resin band
Construction	Shock Resistant
Water resistance	200-meter water resistance
Time adjustment	Bluetooth: Connects to a smartphone and automatically adjusts the time
Power supply and battery life	Approx. battery life: 2 years on CR2032
Sensor feature	Training Function Display of distance, speed, pace, and other calculated values based on accelerometer, auto/manual lap times, Auto Pause, target alert setting (time, calories burned) on/off, training display customization
Smartphone Link feature	Mobile link (Automatic connection, wireless linking using Bluetooth®)
Apps	CASIO WATCHES
App connectivity feature	Auto time adjustment, Easy watch setting, Approximately 300 world time cities, Notification function, Activity history, Life log data, Distance correction by smartphone GPS, Phone finder
Glass	Mineral Glass
Compatible band size	145 to 215 mm
World time	World time 38 time zones (38 cities + coordinated universal time), daylight saving on/off, auto summer time (DST) switching
Stopwatch	1-second stopwatch (Measuring capacity: 99:59'59'')
Timer	Countdown timer for interval measurement (up to five time settings)
Alarm/hourly time signal	4 daily alarms with snooze
Light	LED backlight (Super Illuminator) Auto light switch, selectable illumination duration (1.5 seconds or 3 seconds), afterglow
Calendar	Full auto-calendar (to year 2099)
Accuracy	±15 seconds per month (with no mobile link function)

Highlights

Shock resistant
20 bar water resistant
Accurate timekeeping
Suitable for runners
Tracks training performance
Sporty design

Downloads

Operation Guide

Frequently asked questions

What is the water resistance rating of the G-SHOCK GBD-300-9?

The watch features a 200-meter (20 bar) water resistance rating.

How does the watch track distance and running pace?

It utilizes a built-in accelerometer to measure steps and calculate speed, pace, and distance, with the ability to calibrate distance accuracy using a paired smartphone's GPS.

What smartphone application is compatible with this model?

It connects wirelessly via Bluetooth to the CASIO WATCHES app for managing life logs, activity history, and watch settings.

What battery is used and how long does it last?

The watch operates on a single CR2032 battery with an approximate battery life of 2 years.

Does the watch support vibration alerts?

Yes, it features vibration alerts for training milestones such as elapsed time and calories burned, as well as smartphone calls, emails, and social media notifications.

What materials are used in the construction of the GBD-300-9?

Key components of the case, bezel, and band are made from bio-based resin, paired with a mineral glass face.

Casio G-Shock Black Dial Digital Watch GBD-300-9DR