DIGITAL – 7900 SERIES – GW7900B-1 Monica Jewelers

With the never ending pursuit of toughness and technology, G-Shock introduces a Solar Atomic addition to the tough and rugged G-Rescue series. Already iconic for its four point protection design,large case, oversized buttons, tide & moon graphs, this new model keeps the same design philosophy of allowing for high functionality and operability, in the harshest conditions, even while wearing gloves. With its monotone, grey IP coloring and aperture band design, this new addition to the G-Rescue series not only looks tough, it also very comfortable to wear.

Basic Information

• Case size (L× W× H)

  52.4 × 50 × 17.7 mm

• Weight

  71 g

• Case and bezel material

  Resin

• 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)

Exterior

• Glass

  Mineral Glass

Watch Features

• World time

  World time
  31 time zones (48 cities + coordinated universal time), city code display, daylight saving on/off

• Moon data

  Moon data (moon age of the specific date, moon phase graph)

• Tide graph

  Tide graph (tide level for specific date and time)

• 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 minutes 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

  Electro-luminescent backlight Full auto EL light, afterglow

• Light color

  EL:Blue Green

• Calendar

  Full auto-calendar (to year 2099)

• Mute feature

  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

  Approx. battery operating time:
  9 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