GST-B400CX-1A

Welcome in the Year of the Snake with a special edition G-STEEL crafted at the intersection of metal and resin. Celebrate 2025 with innovative form and design inspired by the ancient ouroboros. This slim GST-B400 features an ouroboros motif, the ancient auspicious symbol of a serpent eating its own tail, representing infinity and immortality. This special timepiece pairs a silver-colored metal bezel and black watch face with gold-colored accents for a design that takes you smoothly from casual settings to formal occasions and back again. The side buttons and strip across the face from the 3 o’clock to 9 o’clock position add textural appeal with a snake pattern touch that nods to the Year of the Snake. The case back is engraved with a special ouroboros illustration representing infinite possibility. The GST-B400 brings together smaller components and a thinner module to deliver an even slimmer profile, while still offering the Bluetooth connectivity and solar power charging you want for greater convenience and significantly less power consumption. Add to this the watch’s Carbon Core Guard structure, and you have the slimmest G-STEEL yet (as of December 2024), measuring just 12.9 mm from case back to bezel top, over a millimeter slimmer than the GST-B100. Passionate attention to the smallest details — with large, easy-to-press stainless steel buttons, a resin band, and silver metal case featuring different finishes on the top and middle bezels — achieves an elegant, transformative look worthy of the Year of the Snake.

• Shock resistant
• 20 bar water resistant
• Keeps yourself in time
• Stable solar power
• Easy to operate via smartphone
• Easy to see in darkness
• Carbon / Stainless steel
• Resin Band
• 200-meter water resistance
• Shock Resistant
• Carbon Core Guard structure
• Mineral Glass
• Neobrite
• Digital-Analog
• MEN'S
• Tough Solar (Solar powered)
• Mobile link (Wireless linking using Bluetooth®)
• CASIO WATCHES
• Auto time adjustment
• Easy watch setting
• Approximately 300 world time cities
• Time & place
• Reminder
• Phone finder
• World time
• 38 time zones (38 cities + coordinated universal time)
• city code display
• city name display
• daylight saving on/off
• auto summer time (DST) switching
• Home city/World time city swapping
• 1/100-second stopwatch
• Measuring capacity:
• 00'00''00~59'59''99 (for the first 60 minutes)
• 1:00'00~23:59'59 (after 60 minutes)
• Measuring unit:
• 1/100 second (for the first 60 minutes)
• 1 second (after 60 minutes)
• Measuring modes: Elapsed time
• lap/split time
• Countdown timer
• Measuring unit: 1 second
• Countdown range: 60 minutes
• Countdown start time setting range: 1 second to 60 minutes (1-second increments and 1-minute increments)
• 5 daily alarms
• Hourly time signal
• Double LED light
• LED light for the face (Super illuminator
• selectable illumination duration (1.5 seconds or 3 seconds)
• afterglow)
• LED backlight for the digital display (Super illuminator
• Full auto-calendar (to year 2099)
• Button operation tone on/off
• Power Saving (display goes blank to save power when the watch is left in the dark)
• Battery level indicator
• Approx. battery operating time:
• 7 months on rechargeable battery (operation period with normal use without exposure to light after charge)
• 18 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)
• Accuracy: ±15 seconds per month (with no mobile link function)
• 12/24-hour format
• Date/month display swapping
• Day display (days of the week selectable in six languages)
• Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.)
• Regular timekeeping:
• Analog: 2 hands (hour
• minute (hand moves every 20 seconds))
• 1 dial (battery level
• mode)
• Digital: Hour
• minute
• second
• pm
• month
• date
• day