| Size | ★★★★ |
| Weight | ★★★ |
| Functions | ★★★★★ |
| Materials | ★★★★★ |
| Battery Years | ★★★★★ |
| Price | ★★ |
GST-B300 Model Range *may be updated
*Want to be the first to know about new G-Shock Updates? Here we store all recent Monthly G-Shock Updates →
Quick Content Guide
- GST-B300 Model Range *in different colors and bands
- Japanese Unique Features in GST-B300 *the most distinctive features in details
- General information about the watch *year of first release, model range etc.
- Official GST-B300 Video *only from Casio Company
- G-Shock GST-B300 Display Guide *for key functions only
- G-Shock GST-B300 on the wrist! *only images and only on the wrist
- GST-B300 Usage Patterns *what the watch is usually meant for
- Feedback from Users and Experts *anonymous from different sources
- GST-B300 Limited Editions *unique style, materials, and price
- The most distinctive specs *from our Editorial point of view
- Other G-Shock GST Watches *similar by price and functions but different by cases
- Official GST-B300 Specs *all details and for base version GST-B300E-5A
- G-Shock GST-B300 PROs & CONs *by experts with 10 years experience
- GST-B300 Comparison Table *with similar G-Shock Watches
- Full Photo Gallery *various images
- Recent News about GST-B300 *the latest breaking news and videos
Enjoy Japanese Unique Features in GST-B300!
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.
Carbon Core Guard Structure.
Bezel & Front Button.
Resin Band.
General Information
| Price | $300 *average Amazon Price, we may earn commission from purchases |
| Year of first Release | 2020 |
| Suitable for Wrist Size | 160 – 230 mm |
| Module Number | 5631 / Manual |
| Model Range | G-STEEL (G-Steel are refined watches and combine high-quality materials with G-Shock’s standard of toughness. Its layered guard structure boasts a double-layer bezel construction of stainless steel and resin or resin and fine resin which delivers the hard, sleek beauty of metal while retaining the impact absorption of resin.) |
| Battery Type | CTL1616 (G-Shock Batteries) Buy Battery on Amazon → |
| Other Divisions the GST-B300 belongs to: *you may find all watches of the division by clicking on the link | G-Shock Ana-Digi G-Shock Carbon Core Guard G-Shock Bluetooth G-Shock Solar |
G-SHOCK G-STEEL Evolution Timeline
April, 2022
GST-B500
370$ on Amazon →
★★★★
The GST-B500 line brings together smaller components and high-density mounting, continuing to deliver Bluetooth connectivity and solar power charging.
More →
May, 2021
GST-B400
350$ on Amazon →
★★★★
An ultra-thin module encased in carbon fiber makes for a stylish G-STEEL timepiece with the slimmest profile yet.
More →
August, 2020
GST-B300
300$ on Amazon →
★★★★
A model that adds a rugged design to a G-STEEL model that uses the carbon core guard structure from G-SHOCK, which continues to evolve in the pursuit of toughness.
More →
March, 2019
GST-B200
250$ on Amazon →
★★★★
A G-STEEL model that uses the carbon core guard structure.
More →
Official GST-B300 Video
G-Shock GST-B300 Display Guide *for key functions only. For you to know how it works))
Watch Face and Display Indicators
- Displayed while an alarm is turned on.
- Displayed while the watch is indicating summer time.
- The second hand will point to [CONNECT] if the watch is connected with a phone.
- Displayed during p.m. times while 12-hour timekeeping is being used.
- The second hand will point to [READY] if the watch is standing by for connection with a phone.
- Battery level
- Displayed while the hourly time signal is enabled
- Displayed while the watch’s hands are shifted for easier reading.
- Displayed while Auto Light is enabled.
- In the World Time Mode, the mode hand points to [WT].
- In the Stopwatch Mode, the mode hand points to [ST].
- In the Timer Mode, the mode hand points to [TR].
- In the Alarm Mode, the mode hand points to [AL].
Connecting with a Phone
Hold down C for about 1.5 seconds to connect with a phone.
– To disconnect, press any button.
Shifting the Hands
Hand shift moves the hands out of the way for easy viewing of display information.
Phone Finder
You can use phone finder to trigger a tone on the phone to make it easy to find.The tone is forced to sound even if the phone is in vibrate mode.
G-Shock GST-B300 on the wrist!
GST-B300 Usage Patterns *what the watch is usually meant for
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
GST-B300 Limited Editions *unique style, materials, and price
The Listing of All G-Shock GST-B300 Limited Watches → *with detailed description about the style
What we like in GST-B300 *comments by experts with 10 years experience in writing about Casio watches
— 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)
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 →
Official Casio Description. 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.
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
G-SHOCK GST-B300 PROs & CONs
*we composed all points based on our ten years experience in writing about CASIO watches. We know what matters when you are searching for your ideal G-SHOCK!
– Carbon Core Guard (the watch is more lightweight but stronger in comparison with a traditional structure)
– Amazing Second Hand (a strong advantage, while most similar watches do not have it)
– Stylish functional disc dial (shows the current function mode and remaining charge)
– Easy to operate via smartphone Bluetooth Accuracy Calibration (checks if the watch shows the ideal time), also called Mobile Link
– Solar Powered (Tough Solar). No need to worry about the battery change Resin & Steel Bands Models – Office & Business Look
– No Sapphire Crystal
– No MultiBand6 (Radio Accuracy), but Bluetooth instead
– Negative digital dials spoil readability (if the model has it)
– Neither big nor small 51 × 50.3 × 15.3 mm. Traditional watch size is 48.9 × 42.8 × 13.4 mm (DW-5600)
– Only traditional functions (World time, Stopwatch, Timer, Alarms etc.). No advanced GPS or Pedometer, etc.
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 | Measuring unit: 1/10 second | 100 minutes |
Stopwatch | 1/1000-second stopwatch | 1/1000-second stopwatch | 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 |
Recent News about GST-B300
- G-Shock GST-B300 PROs & CONs from users and experts
- [G-Shock Comparison] GST-B400 VS GST-B300 VS GST-B200
- [G-Shock G-Steel] GST-B300 and Innovative Carbon Bezel
- [G-Shock Comparison] GST-B300 VS GST-B200 VS GST-W330
- [G-Shock G-STEEL] Meet GST-B300, the latest G-STEEL
You ask, we answer…
It’s CASIO’s original solar-charging system that converts not only sunlight but also light from fluorescent lamps and other sources into power.
It is a Wireless linking using Bluetooth(R) (for time sync with your phone data).
You may manage all watch settings through your phone.
Not sure about GST-B300? There are more G-Shocks!
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