Set contents: Main unit, box, instruction manual, warranty card are attached to the instruction manual
Waterproof specification: 20 ATM water resistant function
solar
World time GMT / UTC
alarm
Since its launch in 1983, the toughness watch G-SHOCK has continued to evolve in search of insatiable strength.
G-STEEL's GST-B400 is slim and has improved design due to the thin module and carbon core guard structure.
Achieve further miniaturization of parts and thinness of modules
While reducing the thickness, it maintains the high functionality of Bluetooth® and solar, and significantly reduces power consumption.
In addition, the carbon core guard structure makes it the thinnest in the G-STEEL series (as of December 2020) while maintaining impact resistance.
The distance from the back to the bezel top is 12.9 mm, which is more than 1 mm thinner than the GST-B100.
In terms of design, by reducing the button guards to the utmost limit, we adopted a large stainless steel button that is slim yet easy to push.
By applying different finishes to the TOP bezel and the middle bezel, you can enjoy the difference in texture, and the finish is particular about the appearance.
In addition to the two standard models, the GST-B400 in a silver case and the GST-B400D in all silver, the resin band is combined with the red vapor-deposited dial, which is the symbol color of G-SHOCK, and the black IP bezel. GST-B400AD and GST-B400BD with black IP applied to the case and band and blue vapor deposition on the dial are available.
Due to the power saving of the module, the texture has been improved with three-dimensional parts and a dial with vapor deposition.
The G-STEEL series combines toughness and design by fusing different materials such as metal and resin.

・ Impact resistant structure
・ Tough solar (solar charging system)
・ 20 ATM water resistant function
・ Mobile link function (function interlocking with compatible mobile phones by Bluetooth® communication)
・ Needle evacuation function (If the needle overlaps with the liquid crystal display and is difficult to see, the needle can be temporarily retracted from above the liquid crystal display)
・ World time: 38 cities around the world (38 time zones, with daylight saving time automatic setting function) + UTC (Coordinated Universal Time) time display, home time city replacement function
・ Stopwatch (1/100 second (less than 1 hour) / 1 second (1 hour or more), 24-hour counter, with lap / split)
・ Timer (set unit: 1 second, maximum set: 60 minutes, measured in 1 second units)
・ 5 time alarms
・ Time signal
・ Battery indicator display
・ Power saving function (In a dark place, the display is turned off after a certain period of time to save power)
・ Fully automatic calendar
・ 12/24 hour display switching
・ Operation sound ON / OFF switching function
・ Date display (month / day display replacement)
・ Day of the week display (switching between 6 languages: English, West, French, German, Italian, and Russian)
-Double LED light: LED light for dial (with super illuminator, afterglow function, afterglow time switching (1.5 seconds / 3 seconds)), LED backlight for LCD part (super illuminator, afterglow function, afterglow time switching (1.5 seconds) With (seconds / 3 seconds)
・ Driving time without solar power generation from full charge When using the function: Approximately 7 months When using the power saving state: Approximately 18 months * Normal quartz accuracy (average monthly difference ± 15 seconds) when not linked with a smartphone ) Works with
* GST-B400, GST-B400D, GST-B400AD, GST-B400BD have been certified by the Radio Law of Japan.



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