G-SHOCK
Master of G

GR-B300-8A2

HK$2,780
In stock
SKU
GR-B300-8A2
  • Shock-resistant
  • Flight log data
  • Dual time
  • Resin reinforced with carbon fibers case
  • Tough Solar
  • Mobile link (Wireless linking using Bluetooth(R))
Add to Wish List

Color Variation

The sky’s the limit! Introducing the GRAVITYMASTER GR-B300, a piece of aviation-inspired professional gear designed to work even in the harshest environments, from the G-SHOCK MASTER of G line. The GR-B300 features a Carbon Core Guard structure, which delivers the shock-resistance, rigidity, and corrosion-resistance of carbon material used in aircraft fuselages. The carbon fiber-reinforced resin case and the seamless bezel design inspired by next-generation aircraft come together in a bold and powerful form. Envision the world through a pilot’s eyes with the flight log memory function for recording current location and time, as well as dual-time simultaneously displaying the time in two time zones. In addition, simply tap on the app to instantly switch between the time back home and local time — a practical function to make traveling abroad that much smoother. Large, dimensional index marks and a metal bezel accentuating the large watch face exude functionality, enhancing the visibility that is so important for pilots, whose job demands intuitive reading of time. The rotary disc indicator at the 9 o’clock position uses a dual-coil motor to ensure smooth rotation and functional beauty. The indicator not only rotates to display alarm on/off and stopwatch; it functions as a battery level indicator as well. The high-contrast black and white color scheme dotted with color accents on the dial and buttons evokes the look of a cockpit instrument panel, while dark color variations express the practical functionality of an aviation worldview. Key resin components used in the case, bezel, and band are made with bio-based resin, a material expected to help reduce environmental impact.
  • Case size (L× W× H): 59 × 54.7 × 15.7 mm
  • Weight: 71g
  • Case and bezel material: Carbon / Bio-based resin
  • Band: Bio-based resin band
  • Shock Resistant
  • Carbon Core Guard structure
  • 200-meter water resistance
  • Time adjustment: Bluetooth: Connects to a smartphone and automatically adjusts the time
  • Power supply and battery life: Tough Solar (Solar powered)
  • Smartphone Link feature: Mobile link (Wireless linking using Bluetooth®)
  • Apps: CASIO WATCHES
  • App connectivity feature: Auto time adjustment; Easy watch setting; Approximately 300 world time cities; Flight log; Phone finder
  • Glass: Mineral Glass
  • Screw Lock Crown
  • Compatible band size: 145 to 215 mm
  • Neobrite
  • Dual time (Home City time swapping)
  • 1-second stopwatch; Measuring capacity: 23:59'59. Measuring modes: Elapsed time, split time
  • Daily alarm
  • LED light (Super Illuminator); Afterglow
  • LED: White
  • Full auto-calendar (to year 2099)
  • Power Saving (hands stop to save power when the watch is left in the dark)
  • Battery level indicator
  • Run time: Approx. battery operating time: 5 months on rechargeable battery (operation period with normal use without exposure to light after charge); 18 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)
  • Accuracy: ±15 seconds per month (with no mobile link function)
  • Date display; Day indicator; Regular timekeeping: Analog: 3 hands (hour, minute (hand moves every 10 seconds), second), 3 dials (dual time hour and minute, dual time 24-hour, day)
More Information
Brand G-SHOCK
Features Shock-resistant Flight log data Dual time Resin reinforced with carbon fibers case Tough Solar Mobile link (Wireless linking using Bluetooth(R))
Collection G-SHOCK
Line-up Master of G
Type Digital + Analog
Color Black
Sub Color Blue
Product Launch Date May 2024
The sky’s the limit! Introducing the GRAVITYMASTER GR-B300, a piece of aviation-inspired professional gear designed to work even in the harshest environments, from the G-SHOCK MASTER of G line. The GR-B300 features a Carbon Core Guard structure, which delivers the shock-resistance, rigidity, and corrosion-resistance of carbon material used in aircraft fuselages. The carbon fiber-reinforced resin case and the seamless bezel design inspired by next-generation aircraft come together in a bold and powerful form. Envision the world through a pilot’s eyes with the flight log memory function for recording current location and time, as well as dual-time simultaneously displaying the time in two time zones. In addition, simply tap on the app to instantly switch between the time back home and local time — a practical function to make traveling abroad that much smoother. Large, dimensional index marks and a metal bezel accentuating the large watch face exude functionality, enhancing the visibility that is so important for pilots, whose job demands intuitive reading of time. The rotary disc indicator at the 9 o’clock position uses a dual-coil motor to ensure smooth rotation and functional beauty. The indicator not only rotates to display alarm on/off and stopwatch; it functions as a battery level indicator as well. The high-contrast black and white color scheme dotted with color accents on the dial and buttons evokes the look of a cockpit instrument panel, while dark color variations express the practical functionality of an aviation worldview. Key resin components used in the case, bezel, and band are made with bio-based resin, a material expected to help reduce environmental impact.
  • Case size (L× W× H): 59 × 54.7 × 15.7 mm
  • Weight: 71g
  • Case and bezel material: Carbon / Bio-based resin
  • Band: Bio-based resin band
  • Shock Resistant
  • Carbon Core Guard structure
  • 200-meter water resistance
  • Time adjustment: Bluetooth: Connects to a smartphone and automatically adjusts the time
  • Power supply and battery life: Tough Solar (Solar powered)
  • Smartphone Link feature: Mobile link (Wireless linking using Bluetooth®)
  • Apps: CASIO WATCHES
  • App connectivity feature: Auto time adjustment; Easy watch setting; Approximately 300 world time cities; Flight log; Phone finder
  • Glass: Mineral Glass
  • Screw Lock Crown
  • Compatible band size: 145 to 215 mm
  • Neobrite
  • Dual time (Home City time swapping)
  • 1-second stopwatch; Measuring capacity: 23:59'59. Measuring modes: Elapsed time, split time
  • Daily alarm
  • LED light (Super Illuminator); Afterglow
  • LED: White
  • Full auto-calendar (to year 2099)
  • Power Saving (hands stop to save power when the watch is left in the dark)
  • Battery level indicator
  • Run time: Approx. battery operating time: 5 months on rechargeable battery (operation period with normal use without exposure to light after charge); 18 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)
  • Accuracy: ±15 seconds per month (with no mobile link function)
  • Date display; Day indicator; Regular timekeeping: Analog: 3 hands (hour, minute (hand moves every 10 seconds), second), 3 dials (dual time hour and minute, dual time 24-hour, day)
More Information
Brand G-SHOCK
Features Shock-resistant Flight log data Dual time Resin reinforced with carbon fibers case Tough Solar Mobile link (Wireless linking using Bluetooth(R))
Collection G-SHOCK
Line-up Master of G
Type Digital + Analog
Color Black
Sub Color Blue
Product Launch Date May 2024

FOLLOW CASIO ACCOUNTS

Newsletter

Discover the new products and offers

By submitting, you agree its e-store operator and its affiliates may use your above personal information for direct marketing of our goods and services, please refer to our Privacy Policy for more details.
Become our
MEMBER
and enjoy
Welcome offer
HK$100 coupon
Member discount
15% off on selected items
Exclusive lucky draw
Get the chance to purchase
CASIO special edition items
Birthday surprise
Celebrate your big day with
special treats
Operated by Jebsen Consumer
CASIO AUTHORIZED
ONLINE FLAGSHIP STORE
14 DAYS OF SHOPPING
PROTECTION
FREE DELIVERY OVER
HK$ 600
FREE INSTALLMENT
OVER HK$ 5000