Casio G-Shock GBD-300 Lineup Sports Oriented G-SQUAD Bluetooth¶¸ Bio-Based Watch GBD300-1D GBD-300-1D GBD-300-1

Introducing the GBD-300 line for your active everyday — the tough, sports-oriented G-SQUAD designed to make training fun.

Find more joy in your workout with the GBD-300, packed with practical functionality to support running and other training regimes. With accelerometer, distance tracking, Smartphone Link, high-resolution display, and more, this G-SQUAD has you covered — from managing your everyday health to improving your endurance. 

Use the GPS functionality of a paired smartphone to adjust distance measurements, after which the watch can measure running distance more precisely even when not connected to your phone. Equipped with Auto Lap, the watch also tracks running pace and automatically keeps track of times over a set distance. Tap into the dedicated app for visuals that help you see your own personal records and easily manage life log data and activity history. Set the watch to vibrate, alerting you to time elapsed, calories burned, and other milestones during training, and you won’t miss any telephone, email, and social media notifications, either.

The display features high-resolution memory-in-pixel (MIP) LCD and Super Illuminator. Together with the auto-light function, which automatically lights with just a tilt of the wrist during running, the GBD-300 ensures visibility, even at night.

Thanks to a shock-resistant structure that places the case between a front bezel and a back bumper bezel, the GBD-300 boasts the slimmest profile of any G-SQUAD. Made of soft urethane, the band offers an even more comfortable fit with band holes placed at 5mm intervals for finer adjustments for a variety of wrist sizes. Soft urethane and a flexible fine-resin covering on the underside keep even vigorous arm movements comfortable.

Key resin components used in the case, band, and more are made with bio-based resin, a material expected to help reduce environmental impact.

Case / bezel material: Resin / Bio-based resin
Bio-based resin band
Shock Resistant
Mineral Glass
200-meter water resistance
LED backlight (Super Illuminator)
Auto light switch, selectable illumination duration (1.5 seconds or 3 seconds), afterglow
LED:White
Mobile link (Automatic connection, wireless linking using Bluetooth®)
Time adjustment
Bluetooth: Connects to a smartphone and automatically adjusts the time
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 (elapsed time, distance, pace, lap time, lap distance, lap pace, average pace, speed, average speed, calories burned)
Training Data (Up to 100 runs, up to 140 lap times per run)
Elapsed time, distance, pace, calories burned
Life Log Data
Daily data display (step count), Monthly data display (running distance)
User profile creation
Flight mode
World time
38 time zones* (38 cities + coordinated universal time), daylight saving on/off, auto summer time (DST) switching
*May be updated when connected to a smartphone.
1-second stopwatch
Measuring capacity: 99:59'59''
Measuring modes: Elapsed time, split time
Countdown timer
Timer for interval measurement (up to five time settings)
Measuring unit: 1 second
Input range: 00'00" to 60'00" (1-second increments)
Others: Auto-repeat (number of repeats settable from 1 to 20)
4 daily alarms with snooze
Power Saving (Display goes blank to save power 3 hours everyday.)
Full auto-calendar (to year 2099)
12/24-hour format
Button operation tone on/off
Vibration on/off
Regular timekeeping:
Hour, minute, second, am/pm, month, date, day
Accuracy: ±15 seconds per month (with no mobile link function)
Approx. battery life: 2 years on CR2032
Size of case : 48.9 × 47.4 × 14.9 mm
Total weight : 60 g