CASIO G-SHOCK GW-7900B-1BER

52.4 × 50 × 17.7 mm

71 g

Resin

Resin Band

Shock Resistant

200-meter water resistance

Radio-controlled Watch; Multi band 6

Tough Solar (Solar powered)

Mineral Glass

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

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

Tide graph (tide level for specific date and time)

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

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

5 daily alarms (with 1 snooze alarm)

Hourly time signal

Electro-luminescent backlight
Full auto EL light, afterglow

EL:Blue Green

Full auto-calendar (to year 2099)

Button operation tone on/off

Power Saving (display goes blank to save power when the watch is left in the dark)

Battery level indicator

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

12/24-hour format

Regular timekeeping:
Hour, minute, second, pm, month, date, day

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