G-Shock GR-B300-1A
GR-B300-1A Angle
G-Shock GR-B300-1A Case Back
G-Shock GR-B300-1A LED Light
GR-B300-1A Rear

G-SHOCK GR-B300 Gravitymaster

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The G-Shock GR-B300 Gravitymaster series shifts to a fighter jet-inspired full analog design with a Carbon Core Guard case, Tough Solar power, and Bluetooth smartphone link. Using Bluetooth with the Casio Watches app offers the Flight Log function to record the current location, along with the time and the date, with the recorded locations viewable on a map on the phone.

 

Bluetooth

$300.00

Categories: , , , Tags: ,

List Price: $300 (GRB300-1A, to be confirmed)

Size: Large
Dimensions (L x W x H): 59 x 54.7 x 15.7 mm
Weight: 71 grams
Band Size Fit: 145 to 215 mm
Module: 5719 (instruction manual at casio.com)
Battery (Lifespan): Solar Rechargeable
Series Launch Year: 2024

Notable Features: Tough Solar, Bluetooth Mobile Link, Dual Time, Stopwatch, Timer, Alarm, LED Light

See full specifications for GR-B300-1A under “Additional information” tab above.

Suggested Uses: Outdoors, Travel

 

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GR-B300 Versus GR-B200


  • Overview
  • Description
  • Brand/Store
  • Availability
  • User Rating
  • Review
  • Specification
  • Size
  • Dimensions (L x W x H mm)
  • Weight (g)
  • Protection
  • Case Material
  • Bezel Material
  • Band Material
  • Glass
  • Neobrite
  • Carbon Core Guard
  • Battery
  • Low Battery Alert
  • Tough Solar
  • Battery Level Indicator
  • Power Saving
  • Bluetooth
  • Smartphone App
  • Bluetooth Functions
  • World Time
  • Stopwatch
  • Stopwatch Unit
  • Stopwatch Max Range
  • Measuring Modes
  • Countdown Timer
  • Countdown Timer Unit
  • Countdown Range
  • Countdown Setting Range
  • Countdown Setting Increment (Lowest)
  • Alarm
  • Light Type
  • Light Color
  • Calendar
  • Compatible Band Size (mm)
  • Battery Life (Approx.)
  • Sensors
  • Other
  • World Time Zones
  • World Time Cities
  • Daylight Saving Time
  • Hourly Time Signal
  • Button Tone On/Off
  • Hand Shift
  • 12/24-Hour Format
  • G-SHOCK GR-B300 Gravitymaster

    G-SHOCK GR-B300 Gravitymaster

    $300.00

  • The G-Shock GR-B300 Gravitymaster series shifts to a fighter jet-inspired full analog design with a Carbon Core Guard case, Tough Solar power, and Bluetooth smartphone link. Using Bluetooth with the Casio Watches app offers the Flight Log function to record the current location, along with the time and the date, with the recorded locations viewable on a map on the phone.

     

    Bluetooth

  • In stock
  • -

  • Large

  • 59 x 54.7 x 15.7

  • 71

  • 200-Meter Water Resistance, Shock Resistant

  • Carbon, Resin, Bio-Based Resin

  • Resin, Bio-Based Resin

  • Resin, Bio-Based Resin

  • Sapphire

  • Neobrite

  • Carbon Core Guard

  • Rechargeable

  • Low Battery Alert

  • Tough Solar

  • Battery Level Indicator

  • Power Save

  • Bluetooth Mobile Link

  • Casio Watches

  • Alarm Settings, Auto Summer Time (DST) Switching, Auto Time Correction, Hand Alignment Correction, One-Touch Time Correction, Phone Finder, Timer Settings, World Time (approx. 300 cities), Flight Log

  • Dual Time

  • Stopwatch

  • 1 second

  • 23:59’59”

  • elapsed time, split time

  • Countdown Timer

  • 1 second

  • 24 hours

  • 1 minute to 24 hours

  • 1 minute

  • 1 Daily, Alarm

  • LED, Super Illuminator, 1.5 Second Afterglow

  • White

  • Full Auto Calendar to 2099

  • 145 to 215

  • G-SHOCK GR-B200 Gravitymaster

    G-SHOCK GR-B200 Gravitymaster

    $350.00

  • The G-Shock GR-B200 Gravitymaster is similar in functions (with Bluetooth and Quad Sensor) to the GG-B100 Mudmaster but has an asymmetrical design inspired by a helicopter flight stick. The GR-B200 also has a more vibration-resistant structure in contrast to the mud and dust-resistant structure of the GG-B100.

     

    Bluetooth Step Counter Altimeter Barometer Compass Thermometer Sunrise & Sunset TIme

  • In stock
  • -

  • Large

  • 63 x 54.1 x 18.3

  • 80

  • 200-Meter Water Resistance, Shock Resistant, Vibration Resistant

  • Carbon, Resin

  • Carbon

  • Resin

  • Mineral, Spherical

  • Neobrite

  • Carbon Core Guard

  • CR2025

  • Low Battery Alert

  • Bluetooth Mobile Link

  • Casio Watches

  • Alarm Settings, Altimeter Settings, Auto Altitiude Calibration, Auto Summer Time (DST) Switching, Auto Time Correction, Barometer Settings, Compass Settings, Hand Alignment Correction, Location Indicator, Mission Log, Mode Sort Sequece and Number of Modes Setting, One-Touch Time Correction, Phone Finder, Step Count Data Transfer, Timekeeping Mode display item setting, Timer Settings, World Time (approx. 300 cities)

  • Home/World Time City Swap, World Time

  • Stopwatch

  • 1 second (after first hour), 1/100 second (first hour)

  • 23:59’59”

  • 1st-2nd place times, elapsed time, split time

  • Countdown Timer

  • 1 second

  • 24 hours

  • 1 minute to 24 hours

  • 1 minute

  • 5 Daily, Alarm

  • 1.5 or 3 Second Afterglow, Auto, Double LED, LED, Super Illuminator

  • White

  • Full Auto Calendar to 2099

  • 2 Years

  • Compass, Pressure (Altimeter and Barometer), Step Counter, Thermometer, Triple Sensor

  • 14-Record Altimeter Memory, Sunrise & Sunset Time

  • 38

  • 38 + UTC

  • Auto DST Switching, DST On/Off

  • Hourly Time Signal

  • Button Tone On/Off

  • Hand Shift

  • 12/24-Hour Format

Some specs for individual models may differ within a series, such as price, materials, weight, etc. Specs are subject to change and are not guaranteed to be accurate here. Dollar prices are in U.S. currency unless otherwise noted. Click the link icons in the gallery images to view our articles on specific models. Gallery images labeled with "(casio.com)" are linked to an official Casio product page. Follow your country's official G-Shock site (gshock.casio.com) for specs on individual models and more release information.
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Specification: G-SHOCK GR-B300 Gravitymaster

Size

Dimensions (L x W x H mm)

59 x 54.7 x 15.7
Weight (g)

71
Compatible Band Size (mm)

Protection

,

Case Material

, ,

Bezel Material

,

Band Material

Resin, Bio-Based Resin
Glass

Neobrite

Neobrite
Carbon Core Guard

Battery

Rechargeable
Low Battery Alert

Tough Solar

Battery Level Indicator

Battery Level Indicator
Power Saving

Power Save
Bluetooth

Smartphone App

Bluetooth Functions

Alarm Settings, Auto Summer Time (DST) Switching, Auto Time Correction, Hand Alignment Correction, One-Touch Time Correction, Phone Finder, Timer Settings, World Time (approx. 300 cities), Flight Log
World Time

Stopwatch

Stopwatch Unit

Stopwatch Max Range

Measuring Modes

elapsed time, split time
Countdown Timer

Countdown Timer Unit

1 second
Countdown Range

Countdown Setting Range

Countdown Setting Increment (Lowest)

1 minute
Alarm

,

Light Type

, ,

Light Color

White
Calendar

Full Auto Calendar to 2099

About Us: G-Central is a fan site covering the latest G-Shock watches and news, including worldwide and regional releases, limited editions, collaborations, and events, as well as other Casio watches and related topics. G-Central is independently managed by fans and is not affiliated with Casio.  G-Central does not speak or act on behalf of Casio.  G-Shock is a registered trademark of Casio Computer Co., Ltd. Visit the official G-Shock site at gshock.casio.com.

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