Revel in eclectic sophistication with the G-STEEL fusion of metal and resin components in a popular all-black G-SHOCK.
Tough construction meets stylish design in a black ion-plated metal bezel set against a base of jet black. With its slim combination module and Carbon Core Guard structure, the black-on-black take of the GST-B400 is a cool fashion statement ready for whatever you are.
PROMOTION MOVIE
Independent bezel for striking metallic texture
The watch features a stainless steel bezel in a sophisticated shape. With painstaking attention to detail, even different facets of the same part are uniquely finished by applying lengthwise, crosswise, or circular hairline and mirror finishes, polishing processes and more. The result is an impressive array of metallic surface textures that captivate the eye from every angle.
Vibrant character, with a multilayer vapour deposition- treated dial Vapour deposition
A power-saving module enables the use of an opaquer dial, and highly chromogenic dial colouration is achieved with multilayer vapour deposition. Vapour deposition is applied to the iconic G-STEEL dial indicator and bridge parts as well as parts of the face design, proving the meticulous care taken through the very last detail.
Carbon Core Guard structure, for the slimmest G-STEEL yet
Carbon fiber-reinforced resin is used as the material for the case to ensure shock resistance while reducing weight and delivering the slimmest case in the G-STEEL line, at only 12.9 mm. The newly developed form of the button guards makes it possible to offer generously sized stainless steel buttons even in this extra-slim design.
Carbon Core Guard structure, both strong and light
Offering strength, lightness and excellent weather resistance, a carbon fiber-reinforced resin case protects the module. Additionally, buffering components made of resin mounted between the upper and lower bezels help absorb external shocks.
Newly developed module delivers slimness and energy-savings
Optimised, high-density mounting of the circuit board structure made it possible to slim the module. A substantial reduction in power consumption was also achieved by reducing the number of watch hands to two and adopting a low-power Bluetooth system. The ability to solar charge with an opaquer dial allowed for a high degree of freedom in dial design.
Metal band with double slide lever for easy band changes
Super Illuminator
(high-brightness LED light)
for maintaining watch readability
in the dark
Watch Features
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 alarms
Hourly 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 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
Exterior
Glass
Mineral Glass
Surface treatment
Black ion plated case
Compatible band size
145 to 215 mm
Other
Neobrite