- Stopwatch Measure times precisely
- World time Times around the world at a glance
- Alarm Built-in alarm function
Casio G-Shock GA-2100-1A4ER • Men's Watch
Carbon Core Guard • Iconic Octagon Design
Model: GA-2100-1A4ER
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Casio G-Shock
Description
The Casio G-Shock GA-2100-1A4ER men's watch sets new standards in terms of robustness and style. Thanks to the innovative Carbon Core Guard structure, this wristwatch is extremely resistant to shocks and impacts, while remaining surprisingly slim and lightweight on the wrist.
The striking black case is complemented by vibrant neon-orange accents on the dial, giving the watch a modern, urban look. With water resistance of up to 20 bar, it is the ideal companion for any situation – from sporting adventures to daily wear in the city.
Special features of the Casio GA-2100-1A4ER
- Carbon Core Guard structure offers maximum protection through a carbon-fiber-reinforced case for extreme durability.
- Iconic octagon design in an ultra-slim case, which serves as a modern homage to the classic G-Shock shape.
- 20 bar water resistance allows for worry-free swimming and diving without equipment during everyday life and on vacation.
This watch is part of the legendary G-Shock collection from Casio, which has been valued worldwide for decades for its indestructible construction and technological innovation.
Care instructions
Care Instructions for Wristwatches
Care & Cleaning
- Daily: Wipe case and strap with a soft, dry cloth to remove dirt and sweat.
- Water-resistant watches: Clean with mild soapy water and a soft brush, rinse, dry thoroughly.
Important: Screw crown in tightly beforehand!!! - Not waterproof: Clean only dry or slightly damp, do not use water or cleaning agents.
- Avoid: Aggressive agents, perfume, cosmetics, and heat.
- Leather straps: Do not soak, clean only slightly damp, and let dry away from heat.
- Water resistance: Do not wear when showering or bathing, have it checked annually.
- Battery (Quartz): Have a dead battery replaced immediately.
- Mechanical watches: Service by a master watchmaker every 5 years.
Storage & Handling
- Store watches separately, not directly with other jewelry (risk of scratches).
- Remove mechanical watches when winding, do not leave crown pulled out.
Jewellery Care – How to Keep Your Jewellery Beautiful:
- Remove jewellery before showering, bathing, and sports.
- Avoid direct sun – wood, leather & co. can fade.
- Hands off – constant touching leaves grease and dirt.
- No aggressive cleaning agents like chlorine, salt water, or disinfectants.
- Apply cosmetics and perfume first, then put on jewellery.
Specifications
All details of the Casio GA-2100-1A4ER at a glance.
Basic data
- Target group
- Men
- Style / Occasion
- Sport
- Manufacturer
- Casio
- Model series / Collection
- G-Shock
- Model number
- GA-2100-1A4ER
- Manufacturer model number
- GA-2100-1A4ER
- EAN / GTIN
- 4549526319334
- Display type
- Analog-to-Digital
- Water resistance in bar
- 200
- Colour
- Black, Red
- Other features
- Shock-resistant, Carbon Core Guard, World time, 5 daily alarms, Double LED Light, Hand Shift Feature, Button tones on/off
Case & Construction
- Case material
- Resin
- Case colour
- Black
- Case diameter in mm
- 45.4
- Case shape
- Round
- Case height in mm
- 11.8
- Weight
- 51 g
- Bezel material
- Fixed
- Watch glass
- Mineral glass
- Case back
- Screwed
Dial & Display
- Dial colour
- Black
- Numerals & Indices
- Line Index
- Second hand
- No
- Luminous material (Lume)
- Yes (pointers only)
Movement & Drive
- Drive type / Movement
- Quartz (battery)
- Calibre / Movement
- Module 5611
- Date display
- Yes
- Stopwatch function
- Yes
- Day display
- Yes
- Timer
- Yes
- Number of batteries
- 2
Strap & Clasp
- Strap material
- Resin
- Strap colour
- Black
- Strap width in mm
- 25
- Clasp
- Pin buckle
- Quick-release system
- No
- Max. wrist circumference
- 21.5 cm
Questions about this product?
We're happy to help.Shipping & returns
Shipping
We ship with DHL GoGreen; large items such as grandfather clocks are sent by freight carrier.
Shipping costs for your country are shown in the cart.
Returns
You have 100 days to try your order at your leisure. If something isn't right, simply send it back.
Casio – Functional Watches for Modern Everyday Life
Casio became known in the 1970s for wristwatches that redefined technology and everyday usability. Digital displays, innovative functions, and robust construction made the brand popular worldwide.
To this day, Casio wristwatches stand for reliability and practical use. They are aimed at people who value functionality, durability, and a clear price-performance ratio.
Shop Worry-Free & Securely
Whether for yourself or as a gift: We guarantee you 100% original products from renowned manufacturers. Your order will leave our premises insured and will reach you the very next business day.
Should the item not fit perfectly, take advantage of our generous 100-Day Returns – uncomplicated and free of charge. Experience for yourself why over 13,000 customers have found their timepieces with us.
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