Casio G-Shock GA-900 Watches

Important Information

  • Year of first Release —  2020
  • Module Number — 5637 / Manual
  • Model Range — STANDART ANA-DIGI (This Line includes Digital and Analog displays on G-Shocks that are the best in “price/quality” category. Usually have traditional digital functions, but with beautiful hands. Don’t worry, the hands won’t prevent you from seeing digits, since there is a special Hand Shift technology that moves them to the neutral position).
  • Other Divisions the GA-900 belongs to: *you may find all watches of the division by clicking on the link
  • Battery Type — CR2016 (G-Shock Batteries)

GA-900 Model Range *may be updated

The most distinctive specs of GA-900 *Editorial
— Decagonal bezel
(very unique industrial style for modern G-Shocks)
— Hand Shift (moves the hands to neutral position for a better digital screen readability)
— 200-meter water resistance (good for swimming but not for deep diving)
— Battery life: 7 years (the longest lasting battery for a non-solar G-Shock watch with an analog display)

Official GA-900 Video

Official Marketing Focus from Casio

G-SHOCK announces a new lineup of heavy-duty model that is great for wear in tough environments and as street fashion items as well.
The industrial design motif of this model is created by a 10-sided bezel that resembles the shape of a nut. The bezel is secured by four screws for a tough and rugged look. Combination timekeeping is provided by analog hands along with a digital display for the ultimate in operational ease. The design of the hands and the graphic figures that appear in the digital readouts create a powerful face design that enhances readability. The band connection and all buttons have checkered surfaces that prevent slipping and contribute to operational efficiency.

Official GA-900 Specs / Features *for base version GA-900C-1A4

  • Case / bezel material: Resin
  • Cloth Band
  • Shock Resistant
  • Mineral Glass
  • 200-meter water resistance
  • LED light (Super Illuminator)
    Selectable illumination duration (1.5 seconds or 3 seconds), afterglow
  • Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.)
  • World time
    31 time zones (48 cities + coordinated universal time), daylight saving on/off, Home city/World time city swapping, One-touch UTC Time Zone Access
  • 1/100-second stopwatch
    Measuring capacity: 23:59’59.99″
    Measuring modes: Elapsed time, split time, 1st-2nd place times
    Others: target time alarm, direct timing start from the timekeeping mode
  • Countdown timer
    Measuring unit: 1/10 second
    Countdown range: 60 minutes
    Countdown start time setting range: 1 to 60 minutes (1-minute increments)
  • 5 daily 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: 7 years on CR2016
  • Size of case : 52.8×49.5×16.9mm
  • Total weight : 63g

GA-900 Comparison Table with similar G-Shock Watches


Price (Amazon)


Year of first Release



±15 seconds per month

±15 seconds per month

±15 seconds per month

SmartWatch Features





Neobrite (hands and hour markers) and LED light (Super Illuminator)

LED light (Super Illuminator)

Neobrite (hands and hour markers) Double LED light

Case / bezel material

Resin / Stainless steel


Carbon (Carbon Core Guard)


Mineral Glass

Mineral Glass

Mineral Glass


3 years on SR927W

7 years on CR2016

3 years on SR726W

Size (mm) *we consider 48.9×42.8×13.4 to be a traditional watch size (as in DW-5600). So you are to compare how far or close the watch is to this size




Full features (if you want to know more)

GM-110 Wiki

GA-900 Wiki

Recent News about GA-900 

All Casio GA-900 News →

You ask, we answer…

How does Hand Shift in GA-900 work?

It moves the hands to neutral position for a better digital screen readability.

What is Decagonal bezel in GA-900?

It is very unique industrial style for modern G-Shocks.

What Battery life does GA-900 have?

7 years (the longest lasting battery for a non-solar G-Shock watch with an analog display).

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