G Shock 2300 Series | GW2310U-1

The GW-2310U keeps the clean, symmetrical design of the popular G-2300, while adding radio-wave time signal reception from six stations around the world for automatic, accurate timekeeping. The simple look always stays in style. Practical functions support daily use, including Tough Solar charging for long-lasting performance and a high-brightness LED backlight for clear visibility in low light.

Basic Information

• Case size (L× W× H)

  52.5 × 46.4 × 15.6 mm

• Weight

  64 g

• Case and bezel material

  Resin / Stainless steel

• Band

  Resin Band

• Construction

  Shock Resistant

• Water resistance

  200-meter water resistance

• Time adjustment

  Radio-controlled Watch; Multi band 6

• Power supply and battery life

  Tough Solar (Solar powered)

Watch Features

• World time

  World time 31 time zones (48 cities + coordinated universal time), daylight saving on/off, one-touch UTC Time Zone Access

• Stopwatch

  1/100-second stopwatch Measuring capacity: 23:59'59.99'' Measuring modes: Elapsed time, split time, 1st-2nd place times

• Timer

  Countdown timer Measuring unit: 1 second Input range: 1 minute to 24 hours (1-minute increments and 1-hour increments)

• Alarm/hourly time signal

  5 daily alarms (with 1 snooze alarm)
  Hourly time signal

• Light

  LED backlight (Super Illuminator) Full auto LED light, selectable illumination duration (1.5 seconds or 3 seconds), afterglow

• Light color

  LED:White

• Calendar

  Full auto-calendar (to year 2099)

• Mute features

  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

  11 months on rechargeable battery (operation period with normal use without exposure to light after charge) 26 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)

• Accuracy

  Accuracy: ±15 seconds per month (with no signal calibration)

• Other features

  12/24-hour format
  Regular timekeeping: Hour, minute, second, pm, month, date, day

• Time adjustment details

  Time Calibration Signals Station name: DCF77 (Mainflingen, Germany) Frequency: 77.5 kHz Station name: MSF (Anthorn, England) Frequency: 60.0 kHz Station name: WWVB (Fort Collins, United States) Frequency: 60.0 kHz Station name: JJY (Fukushima, Fukuoka/Saga, Japan) Frequency: 40.0 kHz (Fukushima) / 60.0 kHz (Fukuoka/Saga) Station name: BPC (Shangqiu City, Henan Province, China) Frequency: 68.5 kHz
  Time calibration signal reception Auto receive up to six* times a day (remaining auto receives canceled as soon as one is successful) *5 times a day for the Chinese calibration signal Manual receive The latest signal reception results