DIGITAL | 7900 SERIES | G7900A-4

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.
Major features include four large bezel screws and protruding surfaces that divide the form of the watch into six sections for a fashionable design. Buttons are among some of the largest available in the G-SHOCK lineup for easy operation.
Low-temperature resistance allows operation even under very cold conditions, while moon and tide graphs provide essential information for marine leisure enthusiasts. A large LCD is divided into sections that make information easy to locate and read whenever you need it.
This 5-color lineup offers the ultimate in easy operation and easy reading.

Basic Information

• Case size (L× W× H)

  52.4 × 50 × 17.7 mm

• Weight

  68.2 g

• Case and bezel material

  Resin

• Band

  Resin Band

• Construction

  Shock Resistant

• Water resistance

  200-meter water resistance

• Environmental resistance

  Low temperature resistant (-20℃)

• Power supply and battery life

  Approx. battery life: 2 years on CR2025

Exterior

• Glass

  Mineral Glass

Watch Features

• World time

  World time 29 time zones (48 cities), daylight saving on/off

• Moon data

  Moon data (moon age of the input data, moon phase graph)

• Tide graph

  Tide graph (tide level for specific date and time)

• Stopwatch

  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

• Timer

  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

• Alarm/hourly time signal

  Hourly time signal
  5 multi-function alarms (with 1 snooze alarm)

• Flash alert feature

  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

• Light

  Electro-luminescent backlight
  Auto light switch, selectable illumination duration (3 seconds or 5 seconds), afterglow

• Light color

  EL:Blue Green

• Calendar

  Full auto-calendar (to year 2099)

• Mute feature

  Button operation tone on/off

• Accuracy

  Accuracy: ±15 seconds per month

• Other features

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