Casio G-Shock G-7900 Watches

About G-7900 in Short. Massive G-Shock-s for those with large hands. Four bezel screws and stepped strap inserts create a powerful effect on the case. The digital display is divided into sections – each function has its own zone. The dial and module are designed for trouble-free operation in severe frost conditions – down to -20 ° C. For beginner sailors and fishermen, the watch provides a display of data on the phases of the moon and a tide / tide sensor. Two separate stopwatches [1000 hours each] allow different time periods to be counted simultaneously and the yacht timer function will beep every minute during the regatta. An advanced alarm clock with the ability to configure 5 signals will not let you miss several important events at once. Finding out the time at night is not a problem – fluorescent illumination does an excellent job of illuminating the dial.

Famous people wearing G-Shock G-7900!

American actor and producer Jake Gyllenhaal is wearing G-Shock G-7900
American rapper 50 Cent is wearing G-Shock G-7900

Have you seen this watch with another person? Let us know!

Price $75  *average Amazon Price, we may earn commission from purchases
Year of first Release 2009
Suitable for Wrist Size150 – 230 mm
Battery TypeCR2025 (Casio Batteries)
Module Number 3194

Feedback from Users *accumulated information from our own comments and emails, forum threads, socials, reviews, etc.

+ tide chart
+ moon Phase
+ decent size screen
+ great dial illumination
+ gray tabs under the case
+ unbreakable ruggedness

– a bit too big (for small wrist)
– a lot of tiny crevasses ( makes cleaning it a bit difficult)

G-7900 Model Range *may be updated

*Want to be the first to know about new G-Shock Updates? Here we store all recent Monthly G-Shock Updates →

The most distinctive specs of G-7900 *Editorial
200-meter water resistance (good for swimming but not for deep diving)
Flash alert (Flashes with buzzer that sounds for alarms, hourly time signals)
Low temperature resistant (stable operation of the watch is guaranteed even at a temperature of -20°C)
Moon data (moon age of the specific date)
Tide graph (tide level for specific date and time)

Other G-Shock G Watches *similar by price and functions but different by cases

These are not all G-Shock G Series. Here is a list of All G-Shock G Watches →

Official Casio Description. From G-SHOCK, the watch that brought unmatched toughness to personal timekeeping, comes a collection of models that deliver a level of protection. These watches are designed and engineered to become partners of people who like their activities rough and rugged.

Casio G-7900 on the wrist!

Official G-7900 Specs / Features *for base version G-7900-1

  • Case / bezel material: Resin
  • Resin Band
  • Shock Resistant
  • Mineral Glass
  • 200-meter water resistance
  • Electro-luminescent backlight
    Auto light switch, selectable illumination duration (3 seconds or 5 seconds), afterglow
  • Flash alert
    Flashes with buzzer that sounds for alarms, hourly time signal, countdown timer time up alarm, countdown timer progress beeper, and stopwatch auto start
  • Low temperature resistant (-20°C)
  • World time
    29 time zones (48 cities), daylight saving on/off
  • Moon data (moon age of the input data, moon phase graph)
  • Tide graph (tide level for specific date and time)
  • 1/100-second stopwatch (ST1)
    Measuring capacity: 999:59’59.99”
    Measuring modes: Elapsed time, split time, 1st-2nd place times
    Other: 5-second countdown auto start
  • 1/100-second stopwatch (ST2)
    Measuring capacity: 999:59’59.99”
    Measuring modes: Elapsed time, split time, 1st-2nd place times
  • Countdown timer
    Measuring unit: 1 second
    Countdown range: 24 hours
    Countdown start time setting range: 1 minute to 24 hours (1-minute increments and 1-hour increments)
    Others: Auto-repeat, progress beeper
  • 5 multi-function alarms (with 1 snooze alarm)
  • Hourly time signal
  • Full auto-calendar (to year 2099)
  • 12/24-hour format
  • Button operation tone on/off
  • Regular timekeeping: Hour, minute, second, pm, month, date, day
  • Accuracy: ±15 seconds per month
  • Approx. battery life: 2 years on CR2025
  • Size of case : 52.4×50×17.7mm
  • Total weight : 68.2g

Recent News about G-7900 

All Casio G-7900 News →

You ask, we answer…

What does 200-meter water resistance in G-7900 mean?

The watch is good for swimming but not for deep diving.

What type of battery does G-7900 have?

2 years CR2025.

Does G-7900 have alarm?

Yes, it has 5 multi-function alarms (with 1 snooze alarm).

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