G - SHOCK - GRB300EC - 1A - CASIO Australia
G - SHOCK - GRB300EC - 1A - CASIO Australia
G - SHOCK - GRB300EC - 1A - CASIO Australia
G - SHOCK - GRB300EC - 1A - CASIO Australia
G - SHOCK - GRB300EC - 1A - CASIO Australia
G - SHOCK - GRB300EC - 1A - CASIO Australia
G - SHOCK - GRB300EC - 1A - CASIO Australia
G - SHOCK - GRB300EC - 1A - CASIO Australia
G - SHOCK - GRB300EC - 1A - CASIO Australia
G - SHOCK - GRB300EC - 1A - CASIO Australia
G - SHOCK - GRB300EC - 1A - CASIO Australia
G - SHOCK - GRB300EC - 1A - CASIO Australia
G - SHOCK - GRB300EC - 1A - CASIO Australia
G - SHOCK - GRB300EC - 1A - CASIO Australia
G - SHOCK - GRB300EC - 1A - CASIO Australia
G - SHOCK - GRB300EC - 1A - CASIO Australia
G - SHOCK - GRB300EC - 1A - CASIO Australia
G - SHOCK - GRB300EC - 1A - CASIO Australia
G - SHOCK - GRB300EC - 1A - CASIO Australia
G - SHOCK - GRB300EC - 1A - CASIO Australia

GRB300EC-1A

GRAVITYMASTER

$649.00
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Whatever you’re doing, wherever you are — the G-SHOCK Master of G line has your back.

Based on GRAVITYMASTER, MUDMASTER, and MUDMAN models that deliver peak performance in punishing conditions in the air and on land, this line features a black watch case symbolizing toughness, with accents in vivid emergency colors that capture the world of professionals involved in rescue efforts and other critical missions.

The organic form of the GRAVITYMASTER GR-B300EC is inspired by next-generation aircraft and rendered with a seamless exterior design. The Carbon Core Guard structure and wide 3D face deliver durability, readability, and a comfortable fit. Enjoy all the practical functions as well, including dual-time simultaneously showing the time in two cities, a flight log memory function for recording routes traveled, and more.

Whatever you’re doing, wherever you are — the G-SHOCK Master of G line has your back.

Based on GRAVITYMASTER, MUDMASTER, and MUDMAN models that deliver peak performance in punishing conditions in the air and on land, this line features a black watch case symbolizing toughness, with accents in vivid emergency colors that capture the world of professionals involved in rescue efforts and other critical missions.

The organic form of the GRAVITYMASTER GR-B300EC is inspired by next-generation aircraft and rendered with a seamless exterior design. The Carbon Core Guard structure and wide 3D face deliver durability, readability, and a comfortable fit. Enjoy all the practical functions as well, including dual-time simultaneously showing the time in two cities, a flight log memory function for recording routes traveled, and more.

Band Type:

  • Bio-based Resin Band

Case and Bezel material:

  • Carbon Fibre-Reinforced Resin
  • Bio-based Resin
  • Stainless Steel

Size:

59 × 54.7 × 15.7 mm

Colour:

Black

Compatible band size:

145 to 215 mm

Glass:

  • Mineral Glass

Weight:

71 g

Water resistance:

  • 200 M

Smartphone Link feature:

  • Mobile link (Wireless linking using Bluetooth®)

World time:

Dual time (Home City time swapping)

Timer:

• Countdown timer
• Measuring unit: 1 second
• Countdown range: 24 hours
• Countdown start time setting range: 1 minute to 24 hours (1-minute increments and 1-hour increments)

Light:

• LED light (Super Illuminator)
• Afterglow

Calendar:

  • Full auto-calendar (to year 2099)

Energy saving feature:

  • Power Saving (Hands stop to save power when the watch is left in the dark)

Stopwatch:

• 1-second stopwatch
• Measuring capacity: 23:59'59
• Measuring modes: Elapsed time, split time

Alarm/hourly time signal:

  • Daily alarm

Battery display/alert

  • Battery Level Indicator

Construction:

• Shock Resistant
• Carbon Core Guard structure

Time Adjustment:

  • Bluetooth: Connects to a smartphone and automatically adjusts the time

Time Adjustment Details

Bluetooth: Connects to a smartphone and automatically adjusts the time

Power supply and battery life:

Tough Solar (Solar powered)

Surface treatment:

Black ion plated bezel

Light Color:

  • White

Accuracy:

  • ±15 seconds per month (with no mobile link function)

Other features:

• Date display
• Day indicator
• Regular timekeeping:
• Analogue: 3 hands (hour, minute (hand moves every 10 seconds), second), 3 dials (dual time hour and minute, dual time 24-hour, day)

Apps:

  • CASIO WATCHES
Afterpay Available
Afterpay available
Free Returns
Flexible Returns*
Free Shipping
Free Shipping*
2 year warranty

Product Features

Emergency colours accenting a black watch face

Vivid red, orange, and yellow hues employed by rescue teams and other professionals are featured as accent colours. Their striking contrast against the powerful solid black design ensures readability while creating a look befitting professional gear.

*Image shows the GR-B300EC-1A.

Cutting-edge design imbued with functional beauty
GRAVITYMASTER
GR-B300EC

The organic form inspired by next-generation aircraft is rendered with a seamless exterior design. Features including the watch’s Carbon Core Guard structure and the wide 3D face deliver durability, readability, and a comfortable fit. Enjoy all the practical functions as well, including dual-time simultaneously displaying the time in two cities, a flight log memory function for recording routes traveled, and more.

*Second image shows the GR-B300-1A.

Carbon Core Guard structure, both strong and light

A carbon fibre-reinforced resin case*1 protects the module, making the most of the high degree of strength and outstanding durability delivered by the carbon material to achieve a size ensuring a comfortable fit.

*1 Due to the characteristics of carbon fibre-reinforced resin, the pattern and colour tone that appears on the surface will vary model by model.

*Image shows the GR-B300EC-1A.

Attention to materials: Bio-based resin

Key resin components used in the case, bezel, band, and more are made with bio-based resin. Produced using renewable organic resources, the material is expected to help reduce environmental impact.

*Image is included for illustrative purposes only.

Solar-powered timekeeping with Bluetooth® connectivity and/or radio control for enhanced accuracy and reliability

GR-B300EC: Bluetooth®
GWG-B1000EC: Bluetooth® and Multiband 6 radio control
GW-9500MEC: Multiband 6 radio control

*Image shows the GR-B300EC-1A.

Super Illuminator (high-brightness LED light) for maintaining watch readability in the dark

GR-B300EC: Dial
GWG-B1000EC: Dial and LCD (Full-auto light)
GW-9500MEC: LCD (Full-auto light)

*Image shows the GWG-B1000EC-1A.