HOT ! Casio G-Shock Master of G-Air Gravitymaster - GRB300-1A4

The sky’s the limit! Introducing the GRAVITYMASTER GRB300, a piece of aviation-inspired professional gear designed to work even in the harshest environments, from the G-SHOCK MASTER of G line.

The GRB300 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 & 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: 59 × 54.7 × 15.7 mmWeight: 71 gCase & bezel material: Carbon / Bio-based resinBand: Bio-based resin bandConstruction: Shock ResistantCarbon Core Guard structureWater resistance: 200 metersTime adjustmentBluetooth: Connects to a smartphone & automatically adjusts the timePower supply and battery life: Tough Solar / Solar powered

Smartphone Link/App Connectivity Features Smartphone Link feature: Mobile link (Wireless linking using Bluetooth®)

AppsCASIO WATCHES

App connectivity featureAuto time adjustmentEasy watch settingApproximately 300 world time citiesPhone finder

ExteriorGlass: Mineral GlassCrown: Screw Lock CrownCompatible band size: 145 to 215 mmOther: Neobrite

Watch Features

World timeDual time (Home City time swapping)

Stopwatch1-second stopwatchMeasuring capacity: 23:59\'59.Measuring modes: Elapsed time, split time

TimerCountdown timerMeasuring unit: 1 secondCountdown range: 24 hoursCountdown start time setting range: 1 minute to 24 hours (1-minute increments and 1-hour increments)

Alarm/hourly time signalDaily alarm

LightLED light (Super Illuminator)Afterglow

Light colorLED:White

CalendarFull auto-calendar (to year 2099)

Energy saving featurePower Saving (hands stop to save power when the watch is left in the dark)

Battery display / alertBattery level indicator

Run timeApprox. 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)

AccuracyAccuracy: ±15 seconds per month (with no mobile link function)

Other featuresDate 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)