An ultra-thin module encased in carbon fiber makes for a stylish G-STEEL timepiece with the slimmest profile yet.
Strong, yet lightweight, the carbon core guard structure absorbs external shocks and retains Bluetooth connectivity and solar power functionality even with smaller components and a thinner module. Measuring just 12.9mm from the back of the case to the top of the bezel, the GST-B400 is over a millimeter thinner than its predecessor .
Your choice of four distinctive styles—the simplicity of a silver metal band and silver case; light silver case set against dark resin band; dial in dramatic red vapor deposition finish paired with a black ion-plated bezel; or dial in bold blue vapor deposition finish with black ion-plated bezel and band. With top bezels treated with five different finishes and middle bezels treated with four, these G-STEEL timepieces deliver exceptional metal textures from every angle.
Basic Information
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Case size (L× W× H)
46.6 × 49.6 × 12.9 mm -
Weight
160 g -
Case and bezel material
Resin / Stainless steel -
Band
Solid BandStainless Steel BandOne-touch 3-fold Clasp -
Construction
Shock ResistantCarbon Core Guard structure -
Water resistance
200-meter water resistance -
Power supply and battery life
Tough Solar (Solar powered)
Smartphone Link/App Connectivity Features
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Smartphone Link feature
Mobile link (Wireless linking using Bluetooth®) -
Apps
CASIO WATCHES
Exterior
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Glass
Mineral Glass -
Other
Neobrite
Watch Features
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World time
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 -
Stopwatch
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 -
Timer
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) -
Alarm/hourly time signal
5 daily alarmsHourly time signal -
Light
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, selectable illumination duration (1.5 seconds or 3 seconds), afterglow) -
Light color
LED:White -
Calendar
Full auto-calendar (to year 2099) -
Mute feature
Button operation tone on/off -
Energy saving feature
Power Saving (display goes blank to save power when the watch is left in the dark) -
Battery display/alert
Battery level indicator -
Run time
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
Accuracy: ±15 seconds per month (with no mobile link function) -
Other features
12/24-hour formatDate/month display swappingDay 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
