Casio G-Shock Master of G-Air Gravitymaster Tough Solar Men's Watch | GR-B300RY-1A9

Introducing the Casio G-Shock  GR-B300RY-1A9 Gravitymaster Men's Watch from the Master of G-Air series is built for professionals who demand performance, precision, and durability in extreme environments. Designed with rescue missions and aviation in mind, this bold timepiece features a 54.7mm case constructed from bio-based carbon and resin, providing exceptional toughness while remaining lightweight at just 71g. The sleek black case and dial are paired with a bright yellow bio-resin strap—a nod to emergency gear and high-visibility safety signals. Inspired by next-generation aircraft, the organic, seamless design of the GR-B300RY exudes modernity and functionality. Its Carbon Core Guard structure enhances shock resistance, while the wide 3D analog face ensures superior legibility in any condition. The watch features dual-time display, flight log memory, and Bluetooth® connectivity for syncing with the G-SHOCK app—perfect for travelers and pilots alike. Powered by Tough Solar, it charges via light and offers long-lasting operation without battery changes. It’s also water-resistant up to 200 meters, features a Neon Illuminator blacklight LED, and is built to withstand the harshest air and rescue conditions. With its cutting-edge tech, rugged construction, and aviation-inspired design, the GR-B300RY-1A9 is a standout tool for those who live and work at the edge. Available at Watch Zone. UPC: 4549526397936

Watch Features:

Smartphone Link/App Connectivity Features

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

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)