CASIO G-SHOCK GR-B300-1A4DR MASTER OF G ANALOG-DIGITAL BLACK WATCH
GR-B300-1A4DR
- Vouchers $18 | $28 | $38 or Extra 10% Off (Min. 2 pcs)
- 1 Year Warranty
- Free Shipping | Enjoy Same-Day Delivery (Min $350)
- Low stock - 2 items left
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Aviation-grade performance meets legendary G-Shock toughness in the Casio GR-B300-1A4DR Gravitymaster.
This Master of G timepiece brings cockpit-inspired functionality with professional aviation features to your wrist. Engineered for pilots and aviation professionals, the carbon core guard structure with bio-based resin case delivers superior strength and durability for demanding environments. Powered by Tough Solar technology, you'll never change a battery—light keeps it running indefinitely. Bluetooth connectivity syncs with your smartphone for automatic time updates and flight log management, while the dual-time analog-digital display provides instant access to multiple time zones.
Key Features:
• Tough Solar power - never change a battery, powered by light
• Bluetooth smartphone link - auto time sync, flight log management
• Carbon Core Guard structure - superior shock resistance
• Bio-based resin case - sustainable, durable construction
• Flight log memory - track your aviation activities
• World time - over 300 cities coverage
• Dual-time display - analog and digital for multiple time zones
• 200m water resistance - professional-grade protection
• Super Illuminator LED - excellent cockpit visibility
• Rotary disc battery indicator - monitor power at a glance
• Stopwatch, countdown timer, alarms
• Full auto calendar - pre-programmed to 2099
Why Choose the Gravitymaster:
The GR-B300-1A4DR combines G-Shock's legendary toughness with professional aviation functionality. The flight log memory lets you track takeoff and landing times, while world time for over 300 cities ensures you're always on schedule across time zones—perfect for pilots, aviation professionals, and frequent travelers.
The carbon core guard structure delivers exceptional shock resistance while the bio-based resin case provides sustainable durability. Tough Solar power means you'll never worry about battery changes, and Bluetooth connectivity keeps you synced with automatic time updates. The Super Illuminator LED ensures excellent visibility in cockpit conditions.
Perfect for aviation professionals, pilots, frequent travelers, and anyone who demands professional flight functionality, solar power, Bluetooth connectivity, and cockpit-inspired G-Shock toughness.
Case / bezel material: Carbon / Bio-based resin
Mineral Glass
Shock Resistant
Mineral Glass
Carbon Core Guard structure
200-meter water resistance
Bluetooth: Connects to a smartphone and automatically adjusts the time
Tough Solar (Solar powered)
Smartphone Link feature
Mobile link (Wireless linking using Bluetooth®)
Apps: CASIO WATCHES
Auto time adjustment
Easy watch setting
Approximately 300 world time cities
Flight log
Phone finder
World time
Dual time (Home City time swapping)
1-second stopwatch
Measuring capacity: 23:59'59.
Measuring modes: Elapsed time, split time
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)
Alarm/hourly time signal
Daily alarm
LED: White
Full auto-calendar (to year 2099)
Energy saving feature
Power Saving (hands stop to save power when the watch is left in the dark)
Battery display/alert
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)
Other features
Date display
Day indicator
Analog: 3 hands (hour, minute (hand moves every 10 seconds), second), 3 dials (dual time hour and minute, dual time 24-hour, day)
Size of Case: 59 × 54.7 × 15.7 mm
Total Weight: 71g
For online purchase, you can have bracelet or leather strap adjustments done at any City Chain store. Please bring along your warranty book for the service.