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About the watch

The multi-layered design of the G SHOCK GA-400 creates a solid three-dimensional appearance complimented by a revolutionary rotary switch. Located at 3 o'clock, the rotary switch enables intuitive operation of classic G SHOCK features including the World Time, Countdown Timer and 5 Daily Alarms.

12/24 Hour Format

Times can be displayed in either a 12-Hour or 24 Hour Format.

Alarm Function

Daily Alarm: sounds each day at the time you set

Auto Calendar

Fully automatic calendar, with allowances made for leap years, pre-programmed to 2099

Product spec

Product Specification

  • 12/24 Hour Format - Times can be displayed in either a 12-Hour or 24 Hour Format.
  • Alarm Function - Daily Alarm: sounds each day at the time you set
  • Auto Calendar - Fully automatic calendar, with allowances made for leap years, pre-programmed to 2099
  • Countdown Timer - Countdown range: 24 hours
  • Display Illumination - Auto light switch, selectable illumination duration, afterglow
  • Stopwatch - 1/100th Sec Stopwatch
  • Water Resistant - 200 Metre/20 Bar
  • World Time - World time for 48 cities (31 time zones, daylight saving on/off, home city/world time city swapping) and coordinated universal time
  • Battery Life - 3 years
  • LED Light - Auto light switch, selectable illumination duration, afterglow
  • Accuracy - +/- 15 seconds per month
  • Size of case - 55.0 × 51.9 × 18.3 mm
  • Total weight - 70 g

Product Features

  • 12/24 Hour Format - Times can be displayed in either a 12-Hour or 24 Hour Format.
  • Alarm Function - Daily Alarm: sounds each day at the time you set
  • Auto Calendar - Fully automatic calendar, with allowances made for leap years, pre-programmed to 2099
  • Countdown Timer - Countdown range: 24 hours
  • Display Illumination - Auto light switch, selectable illumination duration, afterglow
  • Stopwatch - 1/100th Sec Stopwatch
  • Water Resistant - 200 Metre/20 Bar
  • World Time - World time for 48 cities (31 time zones, daylight saving on/off, home city/world time city swapping) and coordinated universal time
  • Battery Life - 3 years
  • LED Light - Auto light switch, selectable illumination duration, afterglow
  • Accuracy - +/- 15 seconds per month
  • Size of case - 55.0 × 51.9 × 18.3 mm
  • Total weight - 70 g
Download PDF Manual

Collection tech

Shock Resistance

Your G-SHOCK will keep ticking after a kicking. Tested against drops of up to 10 metres in height, and able to sustain hammer blows with significant force, these are seriously tough timepieces.

Water Resistance

All G-SHOCK models are resistant to water up to 20 bar/ 200 metres in depth, making them perfect for outdoor and even underwater wear.