Casio G-Shock GST-B300 Watches


Quick Content Guide

  1. Japanese approaches to Tough and Functional Watches in GST-B300! *the most distinctive features in details
  2. General information about the watch *year of first release, model range etc.
  3. GST-B300 Usage Patterns *what the watch is usually meant for
  4. Feedback from Users and Experts *anonymous from different sources
  5. GST-B300 Model Range *in different colors and bands
  6. GST-B300 Limited Editions *unique style, materials, and price
  7. The most distinctive specs *from our Editorial point of view
  8. Other G-Shock GST Watches *similar by price and functions but different by cases
  9. Official GST-B300 Video *only from Casio Company
  10. G-Shock GST-B300 on the wrist! *only images and only on the wrist
  11. Official GST-B300 Specs *all details and for base version GST-B300E-5A
  12. GST-B300 Comparison Table *with similar G-Shock Watches
  13. Full Photo Gallery *various images

Enjoy Japanese approaches to Tough and Functional Watches!

SMARTPHONE LINK. Links with a smartphone for more accurate timekeeping and access to a host of mobile link functions.

Shock Resistant. Shock-resistant construction protects against impact and vibration.

Tough Solar. CASIO’s original solar-charging system converts not only sunlight but also light from fluorescent lamps and other sources into power.

G-SHOCK CONNECTED App. Connection with a phone requires installation of the G-SHOCK CONNECTED App on the phone.

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General Information

Price300$ *average Amazon Price, we may earn commission from purchases
Year of first Release2020
Module Number5631 / Manual
Model RangeG-STEEL (G-Steel are refined watches and combine high-quality materials with G-Shock’s standard of toughness. Its layered guard structure boasts a double-layer bezel construction of stainless steel and resin or resin and fine resin which delivers the hard, sleek beauty of metal while retaining the impact absorption of resin.)
Battery TypeCTL1616 (G-Shock Batteries)
Buy Battery on Amazon →
Other Divisions the GST-B300 belongs to: *you may find all watches of the division by clicking on the linkG-Shock Ana-Digi
G-Shock Carbon Core Guard
G-Shock Bluetooth
G-Shock Solar

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GST-B300 Usage Patterns *what the watch is usually meant for

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Feedback from Users *accumulated information from our own comments and emails, forum threads, socials, reviews, etc.

PROs
+ great looking
+ comfortable, lightweight
+ solar powered
+ bluetooth
+ easy Setting up with a smartphone
+ great size for 7″ wrist
+ the bottom layer is also made out of carbon fiber not resin

CONs
– little pricey for what it is
– not completely accurate time signal from phone

Feedback from Experts *based on comparison info with similar watches by price, model range, etc.

PROs
+ hourly Time Signal
+ affordable price
+ perfect accuracy (Bluetooth (via phone app))
+ Smart Features via G-Shock Connected App
+ 39 time zones world time
+ 1/1000-second stopwatch

CONs
– not too small 51×50×15.5 mm

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GST-B300 Model Range *may be updated

*You may find updated information about colors on our G-Shock 2021 New Releases page →

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GST-B300 Limited Editions *unique style, materials, and price

GST-B300WLP-1A

The Listing of All G-Shock GST-B300 Limited Watches → *with detailed description about the style

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The most distinctive specs of GST-B300 *Editorial
— G-SHOCK Connected App
(you may manage all watch settings through your phone)
— Tough Solar (CASIO’s original solar-charging system converts not only sunlight but also light from fluorescent lamps and other sources into power)
— Mobile link (Wireless linking using Bluetooth(R)) (for time sync with your phone data)
— 200-meter water resistance (good for swimming but not for deep diving)
Carbon Core Guard Structure (protects the module with a carbon case. Highly durable carbon fiber-reinforced resin is added not only to the center case, but also to the front and side button guards, providing even stronger resistance to shocks from above or below, or from any side)
The battery indicator at the 6 o’clock position (designed to evoke a brake disk, shows the remaining battery power by an arrow pointer and a curved red bar, providing visually interesting ways to check the battery)

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Other G-Shock GST Watches *similar by price and functions but different by cases

These are not all G-Shock GST Series. Here is a list of All G-Shock GST Watches →


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Official GST-B300 Video

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Official Marketing Focus from Casio

From G-SHOCK, the watch brand that is constantly setting new standards for timekeeping toughness, come new rugged style G-STEEL models that feature Carbon Core Guard structures.
This new model adopts tough G-SHOCK styling with a disk indicator at 6 o’clock that shows the current mode and charge level, and a front button that completes the overall rugged look. The disk, a round graphic digital display between 1 and 2 o’clock, and a digital display as 12 o’clock add to both functionality and looks.
The GST-B300E model comes with a stainless steel band, along with replacement resin and cloth bands.


G-Shock GST-B300 on the wrist!

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Official GST-B300 Specs / Features *for base version GST-B300E-5A

  • Case / bezel material: Resin / Stainless steel
  • One-touch 3-fold Clasp
  • Stainless Steel Band
  • Solid Band
  • Accompanied attached band
  • Shock Resistant
  • Carbon Core Guard structure
  • Mineral Glass
  • 200-meter water resistance
  • Neobrite and 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)
  • Tough Solar (Solar powered)
  • Mobile link (Wireless linking using Bluetooth®)
  • 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.
  • 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
  • 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)
  • 5 multi-function alarms (with daily, 1 time, schedule)
  • Hourly time signal
  • Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.)
  • Battery level indicator
  • Full auto-calendar (to year 2099)
  • 12/24-hour format
  • Button operation tone on/off
  • Power Saving (display goes blank and hands stop to save power when the watch is left in the dark)
  • Regular timekeeping
    Analog: 3 hands (hour, minute (hand moves every 10 seconds), second),
    Digital: Hour, minute, second, pm, month, date, day
  • Accuracy: ±15 seconds per month (with no mobile link function)
  • Approx. battery operating time:
  • 6 months on rechargeable battery (operation period with normal use without exposure to light after
  • Size of case : 51×50×15.5mm
  • Total weight : 185g

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GST-B300 Comparison Table with similar G-Shock Watches

GST-B300

GST-W330

Price (Amazon)

Year of first Release

2019

2018

Accuracy

Bluetooth (via phone app)

Bluetooth (via phone app)

±15 seconds per month

SmartWatch Features

G-SHOCK Connected App

G-SHOCK Connected App

No

Light

Neobrite and Double LED light (Full auto LED light, Super illuminator)

Neobrite and Double LED light (Full auto LED light, Super illuminator)

Neobrite and Double LED light (Full auto LED light, Super illuminator)

Alarm

5 multi-function alarms (with daily, 1 time, schedule)

5 multi-function alarms (with daily, 1 time, schedule)

5 alarms

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)

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)

100 minutes

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

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

1/100 second stopwatch (60 minutes total with split)

Hourly Time Signal

Yes

Yes

No

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

39 time zones* (39 cities + coordinated universal time), daylight saving on/off, auto summer time (DST) switching, Home city/World time city swapping

31 time zones, 48 cities + UTC

Multi Day Format

Yes

No

No

Multi Language Day

Yes

No

No

Second Hand

Yes

Yes

No

Case / bezel material

Resin / Stainless steel

Carbon / Stainless steel

Resin / Stainless steel

Glass

Mineral Glass

Mineral Glass

Mineral Glass

Battery

Solar powered CTL1616

Solar powered CTL1616

Solar powered

Size (mm) *we consider 48.9×42.8×13.4 to be a traditional watch size (as in DW-5600). So you are to compare how far or close the watch is to this size

51×50×15.5

53.3×49.2×14.5

55.9×49.3×15.3

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Recent News about GST-B300 

All Casio GST-B300 News →


You ask, we answer…

How does Tough Solar in GST-B300 work?

It’s CASIO’s original solar-charging system that converts not only sunlight but also light from fluorescent lamps and other sources into power.

What is Mobile link in GST-B300?

It is a Wireless linking using Bluetooth(R) (for time sync with your phone data).

What does G-SHOCK Connected App in GST-B300 do?

You may manage all watch settings through your phone.


Not sure about GST-B300? There are more G-Shocks!

Back to All G-Shock Models →

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