Introducing the new colour variations of the slim model line, the GST-B400 is made possible by even smaller parts and even slimmer modules, so that neither solar nor Bluetooth functionality is sacrificed. Power consumption has also been significantly reduced.
In addition, the Carbon Core Guard structure of this model allows it to be the thinnest in the G-STEEL series (until April 2021), while retaining high impact resistance. The thickness from the back cover to the top of the frame is only 12.9 mm, more than 1 mm less than the GST-B100 model.
The top frame has five different finishes, while the centre frame has four, creating an elegant effect and changing the appearance of the metal texture depending on the viewing angle.
Carbon Core Guard Structure
Tough Solar (solar powered)
Dual LED light
Mobile Link (wireless connectivity with Bluetooth®)
Hand movement function (hands move out of the way to provide an unobstructed view of the digital content on the display)
World time:38 time zones (38 cities + coordinated universal time), city code display, city name display, daylight saving time on or off, automatic changeover to daylight saving time (DST), change from local time to world time
1/100 second stopwatch:Measuring capacity: 00'00''00~59'59''99 (during the first 60 minutes)
1:00'00~23:59'59 (after 60 minutes)
Measuring modes: Elapsed time, split and lap times
5 daily alarms
Battery charge indicator:Power saving (when the watch is left in the dark the display turns off to save power)
Full automatic calendar (up to the year 2099)
12 and 24 hour format
Date/month display change:Day display (days of the week selectable in six languages)
Digital: hours, minutes, seconds, p. m., month, date, day
Accuracy: ±15 seconds per month (without the Mobile Link function)