Casio G-Shock GST-B400-1A Men's Watch

The Casio G-Shock GST-B400-1A is a premium model from the G-STEEL line, combining durability with an elegant metal design. Thanks to the Carbon Core Guard structure, it achieves outstanding shock resistance while remaining one of the slimmest G-STEEL watches ever made. Ideal for both business and outdoor use, this model offers Bluetooth connectivity and solar power for maximum convenience.

Features

• Carbon Core Guard Structure: Reinforced carbon case ensures exceptional shock and impact resistance.
• Slim Metal Design: Thinner profile compared to previous G-STEEL models for improved comfort and style.
• Tough Solar Power: Charges from sunlight or artificial light — no battery replacement needed.
• Bluetooth® Connectivity: Syncs with your smartphone via the G-Shock Connected app for automatic time updates and settings.
• Dual LED Illumination: Super Illuminator lights up both the dial and display for perfect visibility in the dark.

Benefits

• Reliable timekeeping thanks to Bluetooth synchronization and world time function (39 time zones).
• Extremely durable – resistant to shocks, vibrations, and up to 200 meters of water pressure.
• Solar-powered system saves energy and minimizes maintenance.
• Stylish and functional — suitable for everyday wear, sports, and business occasions.

Package Contents: Casio G-Shock GST-B400-1A wristwatch, original box, instruction manual, warranty card.

Technical Specifications

• Case/Bezel Material: Stainless steel / resin (carbon core)
• Band: Resin
• Glass: Mineral
• Water Resistance: 20 bar (200 m)
• Battery Type: Tough Solar (rechargeable)
• Functions: Bluetooth®, World Time, Stopwatch, Countdown Timer, 5 Alarms, Hand Shift, Full Auto Calendar
• Size: 46.6 × 49.6 × 12.9 mm
• Weight: Approx. 80 g

Casio GST-B400-1A – Perfect Balance of Strength and Style

• Everyday Wear: Elegant enough for office or casual outfits.
• Outdoor Ready: Built for adventure with robust carbon and steel protection.
• Smart Functionality: Bluetooth connection for automatic time correction and phone finder feature.
• Eco-Friendly: Solar power ensures long-lasting performance with minimal environmental impact.

Keywords

Casio G-Shock GST-B400-1A, G-STEEL, Carbon Core Guard, Tough Solar, Bluetooth watch, shock resistant, water resistant 200 m, men’s sports watch, stainless steel, smart analog-digital watch.