Since its launch in 1983, G-SHOCK, the tough watch, has continued to evolve in pursuit of insatiable strength. The G-STEEL GST-B400 is slimmer and has improved design thanks to its thin module and carbon core guard structure. The components have been made even smaller and the module has been made thinner. While keeping the thickness down, the watch maintains high functionality such as BluetoothⓇ and solar power, and power consumption has been significantly reduced. In addition, the carbon core guard structure makes it the thinnest in the G-STEEL series (as of March 2021) while maintaining shock resistance. At 12.9 mm from the back to the top of the bezel, it is more than 1 mm thinner than the GST-B100. In terms of design, the button guard has been reduced to the minimum, resulting in a slim yet easy-to-press large stainless steel button. The top bezel and middle bezel have different finishes, allowing you to enjoy the difference in texture, resulting in a finish that is particular about the appearance. The Color variations include the two standard models, GST-B400 with a resin band and silver case, and GST-B400D with an all-silver case, GST-B400AD with a red metallized dial, the symbolic Color of G-SHOCK, and GST-B400BD with a black IP bezel and black IP case and band, and blue metallized dial. The power-saving module has improved the texture with three-dimensional parts and metallized dial. The G-STEEL series combines different materials, metal and resin, to achieve both toughness and design.
●Shock-resistant construction ●Tough Solar (solar charging system)
●20 ATM water resistance ●Mobile link function (function linkage via Bluetooth communication with compatible mobile phones)
Needle retraction function (When the needle overlaps with the LCD display and is difficult to see, the needle can be temporarily retracted from above the LCD display.)
●World time: 38 cities (38 time zones, automatic daylight saving time setting function) + UTC (Coordinated Universal Time) time display, home city swap function ●Stopwatch (1/100 seconds (less than 1 hour) / 1 second (more than 1 hour), 24 hour counter, lap / split)
● Timer (set unit: 1 second, maximum set: 60 minutes, measured in 1 second units)
● 5 time alarms and time signal ● Battery indicator display ● Power saving function (display turns off after a certain period of time in a dark place to save power)
●Fully automatic calendar●12/24 hour display switching●Operation sound ON/OFF switching function●Date display (month/day display switching)
●Day of the week display (switch between 6 languages: English, Spanish, French, German, Italian, and Russian)
●Double LED light: LED light for dial (with Super Illuminator, afterglow function, afterglow time switch (1.5 seconds/3 seconds)), LED backlight for LCD (with Super Illuminator, afterglow function, afterglow time switch (1.5 seconds/3 seconds))
●Operating time from full charge without solar power generation When using all functions: Approximately 7 months When in power saving mode: Approximately 18 months *When not linked to a smartphone, it will operate with normal quartz accuracy (average monthly difference of ±15 seconds).
- The GST-B400, GST-B400D, GST-B400AD, and GST-B400BD are certified under the Radio Law of Japan.
Case shape: Round Windshield material: Mineral Display type: Analog-digital Clasp: Tang buckle Case material: Resin Case diameter/width: 49.6 millimeters
Case thickness: 12.9 millimeters
Band Material/Type: Resin Band Size: Standard for men Band Width: 28.2 millimeters
Band Color: Black Dial Color: Black Bezel material: Stainless steel Bezel function: Fixed bezel Calendar function: Date Other functions: LED light, Mobile link function that can be linked with compatible smartphones via BluetoothⓇ communication, Shock-resistant structure that is resistant to shock and vibration; Equipped with Tough Solar that converts light into power and stably drives various functions; Carbon core guard structure that protects the module from external impacts with a carbon case.