G-Shock • GRB300RY-1A9 • Gravitymaster Watch
Whatever you’re doing, wherever you are — the G-SHOCK Master of G line has your back.
For total support in the harshest environments, this GRAVITYMASTER watch delivers peak performance in punishing conditions in air. It features bold black to exude toughness and a band in the same bright yellow used for emergency rescues and safety signs. This innovative design is a sure fit for the world of professionals involved in rescue efforts and other critical missions.
The organic form of the GRAVITYMASTER GR-B300RY 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.
This tough watch delivers what you need to make quick decisions and take decisive action in the harshest of environments.
SPECIFICATIONS
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Case size (L× W× H)
59 × 54.7 × 15.7 mm -
Weight
71 g -
Case and bezel material
Bio-based Carbon / Bio-based resin / Stainless steel -
Band
Bio-based resin band -
Construction
Shock ResistantCarbon Core Guard structure -
Water resistance
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)
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Smartphone Link feature
Mobile link (Wireless linking using Bluetooth®) -
Apps
CASIO WATCHES -
App connectivity feature
Auto time adjustmentEasy watch settingApproximately 300 world time citiesFlight logPhone finder
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Glass
Mineral Glass -
Crown
Screw Lock Crown -
Surface treatment
Black ion plated bezel -
Compatible band size
145 to 215 mm -
Other
Neobrite
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World time
Dual time (Home City time swapping) -
Stopwatch
1-second stopwatch Measuring capacity: 23:59'59. Measuring modes: Elapsed time, split time -
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) -
Alarm/hourly time signal
Daily alarm -
Light
LED light (Super Illuminator) Afterglow -
Light color
LED:White -
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) -
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
Accuracy: ±15 seconds per month (with no mobile link function) -
Other features
Date displayDay indicatorRegular timekeeping: Analog: 3 hands (hour, minute (hand moves every 10 seconds), second), 3 dials (dual time hour and minute, dual time 24-hour, day)
Quick delivery and flexible return window
Trusted for over 30 years, Big Time Watches is an authorized dealer of every brand we carry
We carry the latest drops and exclusive styles from the most popular brands
Customer satisfaction is our number 1 priority
Des choix intemporels, un service inégalé !
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