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G-STEEL
GST-B300 Series

GST-B300E-5A

My GShock

A model with a rugged style based on a G-STEEL model that uses the carbon core guard structure from G-SHOCK, which continues to evolve in the pursuit of toughness. A model covered with a rugged and playful design typical of G-SHOCK, with a disc dial that shows the current function mode and remaining charge at the 6 o'clock position, and ruggedly designed front button. Additionally, the round digital graphic at the 1 to 2 o'clock position, which is asymmetrical with the disc dial, achieves both functionality and design, together with the digital LCD at the 12 o'clock position. The model comes with a resin band and a cloth band in addition to the stainless steel band, so wearers can enjoy switching them.

GST-B300E-5A
GST-B300E-5A
GST-B300E-5A
GST-B300E-5A

Specifications

Case size (L× W× H)
51 × 50.3 × 15.3 mm
Weight
185 g
Case and bezel material
Case / bezel material: Resin / Stainless steel
Band
Solid Band
Stainless Steel Band
Accompanied attached band
One-touch 3-fold Clasp
Construction
Shock Resistant
Carbon Core Guard structure
Water resistance
200-meter water resistance
Power supply and battery life
Tough Solar (Solar powered)

Smartphone Link feature
Mobile link (Wireless linking using Bluetooth®)
Apps
G-SHOCK Connected

Glass
Mineral Glass
Other
Neobrite

World time
World time 39 time zones* (39 cities + coordinated universal time), daylight saving on/off, auto summer time (DST) switching, Home city/World time city swapping *May be updated when connected to a smartphone.
Stopwatch
1/1000-second stopwatch Measuring capacity: 00'00''000~59'59''999 (for the first 60 minutes) 1:00'00''0~23:59'59''9 (after 60 minutes) Measuring unit: 1/1000 second (for the first 60 minutes) 1/10 second (after 60 minutes) Measuring modes: Elapsed time, split time
Timer
Countdown timer Measuring unit: 1/10 second Countdown range: 24 hours Countdown start time setting range: 1 second to 24 hours (1-second increments, 1-minute increments and 1-hour increments)
Alarm/hourly time signal
Hourly time signal
5 multi-function alarms (with daily, 1 time, schedule)
Light
Double LED light LED light for the face (Full auto LED light, Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow) LED backlight for the digital display (Full auto LED light, Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
Light color
LED:White
Calendar
Full auto-calendar (to year 2099)
Mute feature
Button operation tone on/off
Energy saving feature
Power Saving (display goes blank and hands stop to save power when the watch is left in the dark)
Battery display/alert
Battery level indicator
Run time
Approx. battery operating time: 6 months on rechargeable battery (operation period with normal use without exposure to light after charge) 19 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)
Accuracy
Accuracy: ±15 seconds per month (with no mobile link function)
Other features
12/24-hour format
Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.)
Regular timekeeping: Analog: 3 hands (hour, minute (hand moves every 10 seconds), second) Digital: Hour, minute, second, pm, month, date, day

Technology /
Design

Carbon Core Guard Structure

Carbon Core Guard Structure

Bezel & Front Button

Bezel & Front Button

Tought Solar

Tough Solar

Resin band

Resin band

G-SHOCK Connected

Smartphone App

- Automatic time adjustment*
- World Time for over 300 cities*
- Alarm/Timer setting
- Phone Finder

* Updating of internal data according to the latest time zone/ daylight saving time information

* App screens shown here may differ from actual screens, 
since the app is currently under development.

* The Bluetooth® wordmark and logo are registered trademarks of Bluetooth SIG, Inc. and any use of these marks by Casio Computer Co., Ltd. is under license.
* Apple, Apple logo and iPhone are trademark of Apple Inc. registered in the United States and other countries. App Store is a service mark of Apple Inc.
* IOS is a trademark or registered trademark of Cisco Systems, Inc. registered in the U.S.
* Google Play and the Google Play logo are trademarks of Google LLC.
* All other company and product names are trademarks or registered trademarks of their respective owners.
List of Countries and Geographic Areas where Product Conforms to Radio Laws or Has Been Approved.

*The color tone of the listed products may differ from the actual product in some cases.

Select a location