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 at 12 o'clock add to both functionality and looks. The GSTB300 model comes with a resin band.

Features:
Smartphone Link (Approximately 300 World Time
cities, alarm, timer, hand alignment correction
home city time swapping, phone finder)
Battery level indicator
New layer guard structure
Tough Solar
Dual time
Super Illuminator

Specifications:
Shock Resistant
Carbon Core Guard structure
Mineral Glass
Neobrite
200-meter water resistance
Case / bezel material: Resin / Stainless steel
Resin Band

Double LED light
LED light (Super Illuminator)
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)
19 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)

LED: White

Size of case / Total weight
Size of case: 51×50.3×15.3mm
Total weight: 82g

Warranty: 2 Year International Warranty