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.

Case size (L× W× H)

59 × 54.7 × 15.7 mm

Weight

71 g

Case and bezel material

Carbon / Bio-based resin

Band

Bio-based resin band

Construction

Shock Resistant

Carbon 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)

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

Crown

Screw Lock Crown

Compatible band size

145 to 215 mm

Other

Neobrite

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 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)

Basic Information

CASIO G-SHOCK MASTER OF G-AIR GRAVITYMASTER MENS 200M - GR-B300-8A2DR