Casio - G-Shock Master Of G-Air Gravitymaster Smartphone Link Analog Tough Solar GR-B300-1A 200M Men's Watch - Black
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About this product
Embrace cutting-edge durability with the Casio GR-B300-1A, a watch designed for extreme conditions. Featuring Tough Solar technology, it ensures reliable power in any environment. The analog display is paired with a digital interface for versatile timekeeping, while the smartphone link functionality offers seamless access to advanced features. Crafted with a robust case and 200m water resistance, this Gravitymaster model is built to withstand the rigors of air, land, and sea, making it the ultimate companion for any adventure.
Hybrid Analog Display
Combines analog hands with a digital screen in one design, giving you versatile, easy‑to‑read time information at a glance.
Smartphone Link Connectivity
Features Bluetooth connection to link with your smartphone for automatic time adjustment and easy access to additional functions via an app.
Tough Solar Charging System
Equipped with Casio’s solar charging system that collects light energy to sustain operation without the need for frequent manual recharge.
Master of G Shock‑Resistant Structure
Built with the rugged construction signature to the G‑Shock Master of G series, ensuring outstanding resistance to impacts and shocks.
200 Meter Water Resistance
Designed to resist water pressure to 200 meters, this watch is suitable for swimming, water sports, and wet‑weather conditions without compromise.
- BrandCasioModel NumberGR-B300-1AProduct NameG-Shock Master Of G-Air Gravitymaster Smartphone Link Analog Tough Solar GR-B300-1A 200M Men's WatchColorBlackCase Thickness15.7 millimetersCase Size55mm
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Embrace cutting-edge durability with the Casio GR-B300-1A, a watch designed for extreme conditions. Featuring Tough Solar technology, it ensures reliable power in any environment. The analog display is paired with a digital interface for versatile timekeeping, while the smartphone link functionality offers seamless access to advanced features. Crafted with a robust case and 200m water resistance, this Gravitymaster model is built to withstand the rigors of air, land, and sea, making it the ultimate companion for any adventure.

This is a Twin Sensor model from the G-Shock Mudmaster Series, designed for use in extreme environments scattered with rubble, dirt and debris. With a push of one large button at the 3 o'clock position, you can check your position with its Compass. The temperature can also be measured easily by pushing the button at 4 o'clock. This model has been developed with operability in mind so that anyone can intuitively check their position using the Compass, even in the most extreme climates, without visual observation. The dust and mud-resistant button guard cylinder structure prevents fine sand and mud from getting into the buttons while also helping to absorb any shock to the buttons and improving operability. Broad hour/minute hands and indices of large Arabic numerals have also been adopted to improve visibility. This design is packed with military-style flare, including a mode display that uses a sprocket-inspired disk dial and a textured band to prevent slipping.

The Casio G-Shock Master Of G-Air Gravitymaster GR-B300-1A4 is built for aviation-inspired toughness and everyday reliability. Its bold analog display, accented with striking orange details, delivers high-visibility readability in any environment. Smartphone Link via Bluetooth provides easy time synchronization and access to advanced functions through your phone. Tough Solar technology keeps the watch powered through light, reducing y worries, while 200-meter water resistance supports swimming, snorkeling, and harsh weather use. Shock resistance, world time, stopwatch, and alarm functions make it ideal for pilots, frequent travelers, and active lifestyles, all wrapped in a rugged, modern G-Shock design.

The Casio G-Shock Mudmaster Analog Digital Solar Powered GWG-2000-1A3 200M Men’s Watch is built for harsh environments and everyday reliability. Its Tough Solar technology keeps the watch charged through any adventure, while mud and dust resistant construction ensures dependable performance in the field. The analog-digital display offers clear, at-a-glance timekeeping, world time, and essential functions for active lifestyles.
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