Watch Tough Solar with Bluetooth Black [Casio] G-Shock [] G-STEEL GST-B400CX-1AJR Men's

Since its release in 1983, G-SHOCK is a toughness watch that has continued to evolve in pursuit of insatiable strength. Introducing a special model that celebrates the beginning of 2025, with an "eternal serpent" motif.

[Shockproof structure & 20 ATM water resistant] Adopts a shockproof structure that is resistant to shock and vibration. It is also equipped with 20 ATM water resistance, allowing it to be used in a variety of locations and situations.

[Tough Solar] Casio's unique solar charging system that stably operates various functions that are subject to heavy loads by combining a solar panel that generates electricity even with a small amount of light and a large-capacity secondary battery.

[Mobile link function] Functions can be linked with compatible smartphones via BluetoothⓇ communication.

[Set contents] The main unit, original packaging, instruction manual, and warranty are included in the instruction manual. *For other product specifications, please check the description column.

[Features & Recommended Points]

●A New Dimension of “Slim × Tough”: Despite its slim case thickness of only 12.9 mm, this model employs the fusion of metal and resin through the CARBON CORE GUARD structure, ensuring exceptional durability against shocks and deformation.

●Solar Charging & Smartphone Link Function: Equipped with Tough Solar technology that converts light into power, reducing the need for battery replacements. Through Bluetooth® connectivity, it links to a dedicated smartphone app for automatic time adjustment, world time display, phone finder, and more.

●High Visibility & Functionality in Design and Lighting: Large stainless steel buttons and a resin band enhance comfort and usability. The Double LED Light (Super Illuminator) ensures clear visibility even in dark environments or at night.

●200 m Water Resistance & Active Use: With 20-bar water resistance, it’s suitable not only for everyday use but also for waterside activities and light outdoor adventures.

●Design Inspired by the “Eternal Serpent (Ouroboros)”: The dial, buttons, and band feature a diamond-patterned snakeskin-like texture, while the case back is engraved with the Ouroboros motif — a serpent eating its own tail. The design offers a strong presence with a refined, fashion-forward appeal.

●Slim Yet Fully Equipped with Functions: Features include World Time (38 cities), 1/100-second stopwatch, countdown timer, five daily alarms, power-saving mode, and a hand shift function (temporarily moves hands away from LCD display). Ideal for daily use, travel, and business situations alike.

[Recommended Usage & Style]

This model is particularly recommended for: - Those seeking a sleek, urban-style watch. - Those who want a tough model that can handle sports and outdoor use. - Those looking for a watch with the latest smart features.

Thanks to its metal-resin hybrid design and slim case, it pairs effortlessly with both business attire (under a shirt cuff) and casual weekend outfits.

The combination of solar power and Bluetooth® connectivity ensures peace of mind for frequent travelers, offering automatic time correction and smartphone location features. The black dial accented with gold highlights and snakeskin texture makes it more than just a sports watch — it’s a statement piece with sophisticated design.

With 20-bar water resistance and shock protection, it’s reliable even in outdoor conditions such as rainy days or near the sea or rivers. The Double LED Light maintains excellent legibility in low-light or nighttime environments.

[Summary]

The CASIO G-SHOCK G-STEEL GST-B400CX-1AJR combines slimness with toughness, solar-powered smart functionality, and a refined design in one hybrid timepiece.

Offering both practicality for daily wear and a design that expresses individuality at a glance, it performs well in business and private settings alike.

For those who value functionality, style, and brand reliability in equal measure, this is undoubtedly a highly recommended choice.