GR-B300-1ADR

BHD 121.230 BHD 134.700
by G-SHOCK
Description

The sky’s the limit. The GRAVITYMASTER GR-B300 is G-SHOCK’s latest aviation-grade tool from the MASTER of G line — built to perform in the harshest conditions.

Its Carbon Core Guard structure, inspired by aircraft engineering, delivers enhanced shock resistance, rigidity, and corrosion protection. A seamless carbon fiber-reinforced case and next-gen bezel design result in a bold, cockpit-ready aesthetic.

Function meets flight with Bluetooth® smartphone connectivity, dual time zones, and flight log memory. The rotary disc at 9 o’clock displays battery level, alarm status, and stopwatch activity — all powered by solar charging.

Bio-based resin is used throughout the case, bezel, and band, reducing environmental impact without compromising strength. The GR-B300 is the ultimate fusion of functionality, toughness, and tech.

Features

The large-diameter, triple-layer dial with a sense of depth ensures readability for pilots, whose job demands intuitive reading of time. In addition to large, dimensional index marks and inset dials inspired by instrument panels, the metal bezel accentuating the large watch face ensures this design exudes functionality.

Specifications

Case Size

59 × 54.7 × 15.7 mm


Weight

71 g


Case & Bezel Material

Bio-based carbon / Bio-based resin


Band Material

Bio-based resin band


Construction

Shock resistant

Carbon Core Guard structure


Water Resistance

200 meters


Power Supply

Tough Solar (solar powered)


Time Adjustment

Bluetooth®: connects to smartphone for automatic time sync


Smartphone Link Features

– Auto time adjustment

– Easy watch setting

– Flight log

– World time (approx. 300 cities)

– Phone finder

App: CASIO WATCHES


World Time

Dual time (Home city swapping)


Stopwatch

1-second stopwatch

– Capacity: 23:59’59

– Modes: Elapsed time, split time


Timer

Countdown timer

– Unit: 1 second

– Range: 1 minute to 24 hours

– Settings: 1-minute and 1-hour increments


Alarm

Daily alarm

Hourly time signal


Light

LED Super Illuminator

Afterglow

Light color: White


Calendar

Full auto-calendar (to year 2099)


Energy Saving Feature

Power Saving (hands stop in the dark)


Battery Indicator

Battery level display


Run Time

– Approx. 5 months (normal use after full charge)

– Approx. 18 months (in darkness with power save on)


Accuracy

±15 seconds per month (no mobile link)


Display

Analog:

– 3 hands (hour, minute*, second)

– 3 dials (dual time hour & minute, 24-hour, day indicator)

*Minute hand moves every 10 seconds