- Original Brand New 100%
- Shock resistant
- 200M water resistant
- Tough Solar
- 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)
- World time
- 31 time zones (48 cities + coordinated universal time), daylight saving on/off
- Home city/World time city swapping
- 1/100-second stopwatch
- Measuring capacity: 59'59.99"
- Measuring modes: Elapsed time, split time, 1st-2nd place times
- Countdown timer
- Measuring unit: 1 second
- Countdown range: 100 minutes
- Countdown start time setting range: 1 second to 100 minutes (1-second increments and 1-minute increments)
- 5 daily alarms
- Hourly time signal
- Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents)
- Battery level indicator
- Power Saving (display goes blank to save power when the watch is left in the dark)
- Full auto-calendar (to year 2099)
- 12/24-hour format
- Button operation tone on/off
- Regular timekeeping
- Analog: 2 hands (hour, minute (hand moves every 20 seconds))
- Digital: Hour, minute, second, pm, month, date, day
- Accuracy: ±15 seconds per month
- Approx. battery operating time
- 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)
- Module No. 5525
- Size of case / total weight
- GST-S310D..........55.9 X 49.3 X 15.3 mm / 183 g
- GST-S300.......55.9 X 49.3 X 15.3 mm / 84 g
- GST-S300BD.....55.9 X 49.3 X 15.3 mm / 172 g
- GST-S300G.......55.9 X 49.3 X 15.3 mm / 84 g