Casio G-SHOCK MASTER OF G GR-B300-1A4JF Air Gravitymaster Bluetooth Solar Watch

Product Overview

The Casio G-SHOCK MASTER OF G Air Gravitymaster GR-B300-1A4JF is a rugged and precise digital-analog timepiece designed for pilots and outdoor enthusiasts. Equipped with Tough Solar power, Bluetooth connectivity, and advanced timekeeping features, this watch offers reliable performance in extreme environments.

Key Features

• Shock Resistant: Built to endure strong impacts and vibration.

• Water Resistant 20 ATM (200 meters): Suitable for swimming and water activities.

• Tough Solar: Solar charging system ensures long-lasting power without frequent battery changes.

• Bluetooth Mobile Link: Connects to your smartphone for:

  • Automatic time correction

  • Easy time setting

  • World time for approx. 300 cities worldwide

  • Flight log feature for pilots

  • Mobile phone finder function

Timekeeping & Functions

• Dual Time Display: Home time and world time with home-time swap.

• Stopwatch: 1-second resolution, up to 24 hours with split timing.

• Countdown Timer: Up to 24 hours, 1-second units.

• 5 Daily Alarms & Hourly Time Signal

• Fully Automatic Calendar: Pre-programmed including leap years.

• Date & Day Display

Illumination

• Super Illuminator LED Light: White LED with afterglow for clear visibility in low light conditions.

Power & Battery

• Operating Time:

  • Approx. 5 months with full charge and normal use without solar charging.

  • Approx. 18 months in power-saving mode.

• Power Saving Function: Hands stop moving after prolonged darkness to conserve energy.

• Battery Level Indicator

Accuracy

• When not linked to a smartphone, quartz accuracy of ±15 seconds per month.

Specifications

• Model: GR-B300-1A4JF

• Case Size: 59 x 54.7 x 15.7 mm

• Weight: 71 g

• Material: Resin case and band

• Glass: Mineral or inorganic glass (scratch resistant)

• Movement: Quartz

Package Includes

• GR-B300-1A4JF Watch

• Original Packaging Box

• Instruction Manual