At a glance

Building on a classic, the GD-400MB has been tailored for the Military as part of the the Matte Black Collection. Stealthful and understated, the matte black finish is broken only by an inverted green and black LCD while additional protector bars guard the face for maximum durability. The perfect G Shock for discreet operations.


Countdown Timer

Measuring unit: 1/10 second

Countdown range: 24 hours

Total weight

72 g


+/- 15 seconds per month

Auto Calendar

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

Alarm Function

Snooze function: Each time you stop the alarm, it sounds again after a few minutes

Flash alert - the watch flashes with a buzzer at the time set

Hourly Time Signal: Causes the watch to beep every hour on the hour

Size of case

55.0 x 49.7 x 16.6 mm

Water Resistant

200 Metre/20 Bar

Button Tones On/Off

The button tones on the mode button can be switched off for discreet operation. Preset alarm or timer functions remain active.

Display Illumination

Auto light switch, selectable illumination duration, afterglow

World Time

31 time zones (48 cities + coordinated universal time)

12/24 Hour Format

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

Shock Resistant

Shock Resistant construction protects against impact and vibration


1/100th Sec Stopwatch


Related Links

Support Information