Introducing the new rugged style of G-STEEL models that feature Carbon Core Guard structures. These new models adopt tough G-SHOCK styling with a disk indicator at 6 o’clock that shows the current mode and charge level, and a front button that completes the overall rugged look. The disk, a round graphic digital display between 1 and 2 o'clock, and a digital display as 12 o'clock add to both functionality and looks.

• Model #GSTB300SD-1A
• Shock Resistant
• Carbon Core Guard structure
• Mineral Glass
• Neobrite
• 200-meter water resistance
• Case / bezel material: Carbon / Stainless steel
• Resin Band
• Double LED light
• LED light for the face (Full auto LED light, Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
• LED backlight for the digital display (Full auto LED light, Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
• Tough Solar (Solar powered)
• Mobile link (Wireless linking using Bluetooth)
• World time
• 39 time zones* (39 cities + coordinated universal time), daylight saving on/off, auto summer time (DST) switching, Home city/World time city swapping
• *May be updated when connected to a smartphone.
• 1/1000-second stopwatch
• Measuring capacity:
• 00'00''000~59'59''999 (for the first 60 minutes)
• 1:00'00''0~23:59'59''9 (after 60 minutes)
• Measuring unit:
• 1/1000 second (for the first 60 minutes)
• 1/10 second (after 60 minutes)
• Measuring modes: Elapsed time, split time
• Countdown timer
• Measuring unit: 1/10 second
• Countdown range: 24 hours
• Countdown start time setting range: 1 second to 24 hours (1-second increments, 1-minute increments and 1-hour increments)
• 5 multi-function alarms (with daily, 1 time, schedule)
• Hourly time signal
• Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.)
• Battery level indicator
• Full auto-calendar (to year 2099)
• 12/24-hour format
• Button operation tone on/off
• Power Saving (display goes blank and hands stop to save power when the watch is left in the dark)
• Regular timekeeping
• Analog: 3 hands (hour, minute (hand moves every 10 seconds), second),
• Digital: Hour, minute, second, pm, month, date, day
• Accuracy: ±15 seconds per month (with no mobile link function)
• Approx. battery operating time:
• 6 months on rechargeable battery (operation period with normal use without exposure to light after charge)
• 20 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)