$549.00 $799.00


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$549.00 $799.00
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Introducing new color variations to the lineup of slim G-STEEL GST-B400 models with new, improved designs made possible by a thin module and carbon core guard structure. There is a...
$549.00 $799.00
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Order Restrictions

Shipping: All orders are courier within 1-2 Days from payment clearance. We can arrange Delivery Nationwide at buyer’s cost and will quote if your place is not mentioned. Generally, orders of Watches or Jewellery are shipped nationwide at a flat rate of $8.

Return Policy


No returns will be accepted on a ‘change of mind’ basis, so please be sure before you buy. All returns must comply with the Consumers Guarantees Act or Fair Trading Act. We will replace items if the item is defective. Goods damaged in transit must be reported within 24 hours or at the same time before signing the docket if you see any damage on the box. Evidence of fault such as photos may be required. Any returned goods must be in unused condition with its original package. Shipping costs is not refundable and purchaser should be responsible for costs to return the product. We will be responsible to send replaced goods to purchaser if it is faulty.



  • 357 Great North Rd Henderson Auckland
  • (09) 836 3617
  • nuttallhenderson@gmail.com
    • Description

      Introducing new color variations to the lineup of slim G-STEEL GST-B400 models with new, improved designs made possible by a thin module and carbon core guard structure. There is a standard model in this lineup, the all-silver color GST-B400D.

      The GST-B400 is made possible by even further miniaturization of its parts and thinning of its modules without sacrificing any Bluetooth or solar function. Power consumption has also been significantly reduced.
      In addition, the carbon core guard structure of this model helps to make it the thinnest of the G-STEEL Series (as of Apr 2021) while maintaining a high level of impact resistance. The thickness from the back cover to the bezel top is only 12.9 mm, which is more than one millimeter less than the GST-B100 model.
      In terms of design, the number of button guards has been reduced as much as possible, enabling the use of large stainless steel buttons that are slim yet easy to operate.

      The top bezel has been given five different finishes, while the middle bezel has been given four different finishes, which creates an elegant effect and changes the appearance of the texture of the metal depending on the viewing angle.

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      Case size (L× W× H)

      46.6 × 49.6 × 12.9 mm


      160 g

      Case and bezel material

      Resin / Stainless steel


      Solid Band
      Stainless Steel Band
      One-touch 3-fold Clasp


      Shock Resistant
      Carbon Core Guard structure

      Water resistance

      200-meter water resistance

      Power supply and battery life

      Tough Solar (Solar powered)

      Smartphone Link feature

      Mobile link (Wireless linking using Bluetooth®)




      Mineral Glass



      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


      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


      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


      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



      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: ±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
    • FAQs
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