Casio G-Shock Master Of G-Air Gravitymaster Smartphone Link Analog Tough Solar GR-B300-1A 200M Men's Watch

Casio G-Shock GR-B300-1A — Gravitymaster Master of G-Air, Built for the Sky

The G-Shock GR-B300-1A is a Gravitymaster — Casio's aviation-oriented Master of G series designed for those who operate at altitude and demand absolute reliability. The 54.7mm case houses a tough solar-powered analog movement with smartphone link capability via Bluetooth, automatic time sync, and a suite of aviation-relevant functions, all wrapped in G-Shock's legendary 200M water resistance and shock-resistant construction. A serious tool watch for serious use.

Key Features

• Movement: Tough Solar analog with smartphone link — solar-powered, Bluetooth-connected, auto time sync
• Case diameter: 54.7mm — large, commanding Master of G presence
• Series: Gravitymaster — aviation-oriented Master of G, engineered for altitude
• Connectivity: Smartphone link via Bluetooth — automatic time adjustment and data sync
• Water resistance: 200M — exceptional durability for any environment
• Power: Tough Solar — charges via sunlight, no battery changes
• Style: Aviation tool watch — a G-Shock built for professionals who demand the best
• Reference: GR-B300-1A

At $380, the GR-B300-1A is a flagship G-Shock for those who take their tools seriously — solar power, smartphone link, 200M water resistance, and Gravitymaster aviation credentials in one of the most capable G-Shock cases available. Built to perform wherever you go.

Authentic Casio G-Shock timepiece. Orders ship directly from our supplier. See our shipping policy for delivery estimates.