Casio G-Shock GA-900 Watches

Important Information

  • Price – 130$
    *average Amazon Price, we may earn commission from purchases
  • 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)

Enjoy our G-Shock GA-900 Watch Review

This GA-900A-1A9 model, like the entire GA-900 line, is of very high quality. The strap’s quality and the “serpentine” styling continued to impress me by the end of the review. The watch is not suitable for everyone, as the size is difficult to call compact, and the style is not designed for strict business meetings. But if your life, clothing style, profession allow, I see no reason not to enjoy the pleasant emotions of the industrial GA-900 for a very reasonable price. Read Full Review →

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

+ nice design
+ big size but not gaudy
+ 7 years battery

– the light may be brighter
– readability is not ideal
– not for all wrists (big size)

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

Auto-Back Light




Alpha Gel /
Vibration Resistance




Magnetic Resistance




Mud Resistance




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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