Casio G-Shock G-Steel Bluetooth Smartphone Mens Watch GSTB100-1A

In stock


The world-famous G-Shock brand introduces the first G-Steel with chronograph functionality on a pure analog watch model. It showcases a super tough design with the new 'Layer Guard Structure' feature as well as an array of other cool functions such as smartphone linking, Tough Solar, dual world time, and a high-quality rubber band that offers a level of durability comparable to that of metal. The advantages of the strap include an improved fit around the wrist, as well as comfort and lightness, leading to less strain. Its LED illumination is quite impressive in its ability to allow one to read the dial in the darkest of places.

  • 58.1×53.8×14.1mm Silver Stainless Steel Case
  • Black, High-durability Casio Rubber Strap
  • Black Dial with 3 Subdials
  • Subdial at 12H: Alarm/Timer/Stopwatch Mode Indicator + Day of Week
  • Subdial at 6H: Dual Time
  • Subdial at 9H: Battery Level Indicator
  • Total weight: 101 grams
  • Mineral Glass
  • Neobrite
  • Shock Resistant
  • Screw Lock Crown
  • 200-meter water resistance
  • Solar powered
  • LED light (Super Illuminator)
  • Mobile link (Wireless linking using Bluetooth®)
  • Dual time (Home city time swapping)
  • 1-second stopwatch
    Measuring capacity: 23:59'59
    Measuring mode: split time
  • Countdown timer
    Measuring unit: 1 second
    Countdown range: 24 hours
    Countdown start time setting range: 1 minute to 24 hours (1-minute increments and 1-hour increments)
  • Daily alarm
  • Battery level indicator
  • Power Saving (hands stop to save power when the watch is left in the dark)
  • Full auto-calendar (to year 2099)
  • Date display
  • Day indicator
  • Regular timekeeping
    Analog: 3 hands (hour, minute (hand moves every 10 seconds), second),
    3 dials (dual time hour and minute, dual time 24-hour, day)
  • Accuracy: ±15 seconds per month (with no mobile link function)
  • Approx. battery operating time:
    5 months on rechargeable battery (operation period with normal use without exposure to light after charge)
    24 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund as soon as we get the returned item.

If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item. Once Return Authorization is given please return the item within 14 days. No packages will be accepted once the return period has expired.


We ship only to continental US, Alaska & Hawaii address. We do not ship to P.O.Box, APO/FPO address or make any International shipments.

All orders are processed and shipped in 48 HR period once the payment is approved and received.

All orders are shipped with Priority Mail service ( 2-3 days ) Some areas it takes an additional day ( Hawaii, Alaska and rural areas ). Please also consider that Sundays and Holidays will delay the delivery.

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