DIGITAL,7900 SERIES GW7900B-1

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 time31 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 stopwatchMeasuring capacity: 23:59’59.99”Measuring modes: Elapsed time, split time, 1st-2nd place times

Timer

Countdown timerMeasuring unit: 1 secondInput 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 backlightFull 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 SignalsStation name: DCF77 (Mainflingen, Germany)Frequency: 77.5 kHzStation name: MSF (Anthorn, England)Frequency: 60.0 kHzStation name: WWVB (Fort Collins, United States)Frequency: 60.0 kHzStation 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 receptionAuto 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 signalManual receiveThe latest signal reception results