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GR-B300-1ADR
Built for the skies, the G-SHOCK GR-B300-1ADR GRAVITYMASTER is crafted for aviation professionals and adventurers alike. Its Carbon Core Guard structure and bio-based resin construction offer exceptional shock resistance and lightweight durability. The analog-digital display is enhanced with bold, high-visibility markers, dual-time functionality, and a rotary disc at 9 o’clock that doubles as a battery level and alarm indicator. With Bluetooth connectivity, flight log memory, and solar charging, this watch keeps pace with your journey — whether across time zones or through the toughest terrains.
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
