Casio - G-Shock Master Of G-Air Gravitymaster Smartphone Link Analog Tough Solar GR-B300-1A4 200M Men's Watch - Black
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About this product
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.
Master of G Gravitymaster aviation design
Built as part of the Master of G-Air Gravitymaster series, this watch is engineered specifically for aviation-inspired toughness. The bold analog display, prominent bezel guards, and high-visibility hands and markers ensure legibility and durability in demanding environments, from cockpit conditions to everyday impact and vibration.
Smartphone Link with Bluetooth connectivity
Integrated Bluetooth allows the watch to link with a compatible smartphone via the dedicated app, enabling automatic time adjustment, world time setting, flight log functionality, and easy configuration of alarms and timers. This connectivity ensures precise timekeeping across time zones with intuitive, app-based control.
Tough Solar power with long-lasting performance
Casio’s Tough Solar technology converts light from the sun and indoor sources into energy, reducing the need for y replacement. A high-capacity rechargeable cell, combined with a power-saving function, delivers reliable operation of all features—including Bluetooth and high-brightness LED lighting—over extended periods.
200-meter water resistance and G-Shock shock protection
Rated to 200 meters of water resistance, the GR-B300-1A4 is suitable for swimming, snorkeling, and professional marine activity. The signature G-Shock shock-resistant structure protects the movement from drops, knocks, and strong vibrations, making it a robust choice for harsh, high-impact settings on land, in the air, or around water.
High-legibility aviation-style layout with LED illumination
Large, contrasting hands and indexes, combined with the bold black-and-orange color scheme, provide instant readability at a glance. A high-brightness LED light illuminates the dial in low-light conditions, while the multi-hand analog layout clearly separates time, mode, and function displays for quick, intuitive operation.
- BrandCasioModel NumberGR-B300-1A4Product NameG-Shock Master Of G-Air Gravitymaster Smartphone Link Analog Tough Solar GR-B300-1A4 200M Men's WatchColorBlackCase Thickness15.7 millimetersCase Size54mm
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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.
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.
The Carbon Core Guard structure takes the famous G-Shock toughness to a whole new level. The fine resin incorporates carbon fiber to make a tough yet light weight material with the kind of rigidity far more superior to that of usual resin. It is now more resistant to damages and deformation, eliminating the need for external button guards. Everything about it reeks of a bold toughness.
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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