CASIO Watches G-SHOCK GA-100-1A2

Key Features of Casio G-SHOCK GA-100-1A2 Men's Analog-Digital Watch

The Casio G-SHOCK GA-100-1A2 is built for those who demand ruggedness, bold style, and everyday functionality in one powerful timepiece. Designed to resist shocks, magnetic forces, and water, this iconic G-SHOCK combines oversized toughness with urban sport aesthetics. Its vibrant blue accents on a matte black body make a strong statement whether you're at the gym, on the trail, or out in the city.

Packed with features like a 1/1000-second stopwatch, world time, multiple alarms, and full auto-calendar, this watch is made to handle action—without breaking a sweat.

Why Choose the Casio GA-100-1A2?

Shock Resistance for Uncompromising Durability

The GA-100-1A2 is engineered to withstand harsh impacts and sudden shocks. Whether dropped during an intense workout or banged against a rock face, the internal components stay protected.

Magnetic Resistance for Tech-Savvy Environments

Its ISO-compliant magnetic resistance keeps the watch unaffected by electromagnetic fields from phones, speakers, and electronics.

Bold, Oversized Style with Striking Blue Accents

The 51.2mm case and layered dial design give the watch a strong, sporty presence. Blue accents offer contrast and character against a matte black finish.

Water Resistance to 200 Meters

Take it swimming, snorkeling, or through heavy rain—the watch stays fully functional under water pressure up to 200 meters.

LED Backlight for Low-Light Visibility

With the touch of a button, the LED backlight illuminates the dial, perfect for dark environments.

Functions That Enhance Your Everyday Life

1/1000-Second Stopwatch

Perfect for timing laps, workouts, or any activity requiring ultra-precision.

World Time Function

Access time in 48 cities and 29 time zones—ideal for business travelers and global adventurers.

5 Daily Alarms & Hourly Time Signal

Use the alarms to stay organized and alert throughout your day. Hourly signal optional.

Full Auto Calendar (To Year 2099)

Set it once and forget it—automatically adjusts for leap years and varying month lengths.

12/24-Hour Format

Choose between 12-hour or 24-hour time display to match your preference.

Countdown Timer

Helps you structure time intervals, whether for workouts, meetings, or reminders.

How to Use Your GA-100-1A2 Effectively

Setting the Time

Easily adjust the analog and digital time using the dedicated buttons—no radio sync needed.

Using the Stopwatch

Start and stop with precision. Supports lap and split time tracking for detailed performance reviews.

Switching Between Time Zones

Toggle through world time cities using simple button combinations.

Activating the Backlight

Press the light button at the top right to view the display in the dark.

Designed for a Dynamic Lifestyle

Sport & Fitness

Ideal for gym workouts, running, or high-impact sports thanks to its durability and functionality.

Outdoor Adventures

Shock and water resistance make this the go-to for hiking, biking, and exploring.

Urban Commuting

Stylish enough for everyday wear—pairs well with both casual and active streetwear.

Travel & Exploration

World time and alarm features make it a reliable companion for international travel.

What’s in the Box?

• 1 × Casio G-SHOCK GA-100-1A2 Watch

• 1 × User Manual (English included)

• 1 × Warranty Card (international coverage depends on retailer)

• 1 × G-SHOCK Tin or Box (presentation may vary)

Care & Maintenance Tips

Keeping It Clean

Wipe with a soft cloth and mild soap solution. Avoid abrasive cleaners.

Battery Life

Uses a CR1220 battery, lasting up to 2 years. Frequent use of alarms and lighting may reduce this.

Avoiding Extreme Temperatures

Avoid excessive heat or cold to maintain peak performance.

Water Resistance Notes

Don’t press buttons underwater to maintain water-resistance seal integrity.

Final Thoughts

The Casio G-SHOCK GA-100-1A2 is more than a watch—it’s a rugged, stylish tool built for the modern man. With reliable functionality, shockproof durability, and a bold look, it suits those who live with purpose, style, and momentum.

Whether you're training, traveling, or taking on daily challenges, the GA-100-1A2 keeps up—and stands out.