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Casio

Casio Unisex's Quartz Watch GA-2100-1A1ER

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Availability: Only 3 left in stock, order soon!
Fulfilled by Watch Novelty
Arrives Friday, Feb 6
Order within 1 hour and 22 minutes
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Description

For those who want to know exactly, the countdown timer helps remind special or recurring events by emitting an acoustic signal at the set time. It then automatically counts back from the preset time. The time can be set in minutes and up to 24 hours in advance. This function is particularly practical for daily use of medications or interval training. The daily alarm reminds you of daily recurring events, where an acoustic signal sounds at the set time. This model has five independent alarms - especially practical for daily use of medicines or for keeping regular appointments.

Is Discontinued By Manufacturer ‏ : ‎ No


Language ‏ : ‎ English


Product Dimensions ‏ : ‎ 3.94 x 3.94 x 1.97 inches; 1.06 ounces


Item model number ‏ : ‎ GA-2100-1A1DR


Department ‏ : ‎ mens


Batteries ‏ : ‎ 1 Lithium Metal batteries required.


Date First Available ‏ : ‎ August 20, 2019


Manufacturer ‏ : ‎ Casio


Brand, Seller, or Collection Name: Casio


Model number: GA-2100-1A1DR


Part Number: GA-2100-1A1ER


Item Shape: Round


Dial window material type: Mineral Glass


Display Type: Analog-Digital


Clasp: Buckle


Case material: Plastic


Case diameter: 42 millimeters


Case Thickness: 11.8 millimeters


Band Material: Plastic


Band size: Unisex


Band width: 22 millimeters


Band Color: Black


Dial color: Black


Bezel material: Plastic


Calendar: date / month


Special features: Alarm


Item weight: 1.06 ounces


Movement: Quartz


Water pressure resistance: 20 bar


Water resistant depth: 200 Meters


Product Warranty: For warranty information about this product, please click here


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Feb 6

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Bang for your buck
Great durable watch. Use it for timing my runs and being an alarm clock. Definitely worth it you can get it below $90. Overall solid watch.
Reviewed in the United States on March 17, 2025 by Gokuss5
    • Casio really knocked it out of the park.
I've been a fan of g-shock watches for a long time but I won't deny a lot of them don't fit my personal fashion choices. I have skinny wrists so probably 90% of them are too large for me. Plus I work in an office most days and have to wear something that looks a bit nicer than the rugged appearance of the typical g-shock. So with all that said, this watch really ticks a lot of boxes for me. Yes, I would agree with some reviews here that the design choices do sacrifice the functionality at times. The LCD is small and the "stealth" looks of the all black model does affect the legibility. But having the ability to wear a g-shock with a suit makes it all worth it for me. I still find the watch plenty easy to read at a glance. I have found that this watch is especially well suited for travel. It's a good all around look for a variety of business casual outfits and looks equally at home in the board room as it does networking at a local restaurant. It's more than rugged enough to stand up to airports and taxi cabs and the alarms give me a little extra assurance when I need to get up early but I'm thrown off being in a new time zone. I am very pleased with this watch. If legibility is your top concern, there are variations of the "casio oak" that might be better suited for you. For me, having the all black look was worth some small sacrifices and I absolutely knew that was going to be the case when I bought it. ... show more
Reviewed in the United States on October 10, 2023 by Andrew Kaiser
    • IT'S WORTH IT
Real nice, I thought It'll be bigger but I'm really happy with the product. It got shipped one day earlier, so plus points.
Reviewed in the United States on March 4, 2025 by Juan Elías Sánchez Fernández
    • Wears better than you can imagine
I must say, this is maybe my favorite watch I own now lol. The 2100 wears sooo well, not as chunky and clunky as lots of G shocks, it’s way lighter and sleeker, and it is the perfect size. It still feels substantial and tough though, and will look great next to other watches of any price point. I generally can’t recommend it enough and I have every intention of buying another color or two. You won’t regret buying it. ... show more
Reviewed in the United States on August 27, 2024 by Griffin Ripley
    • Excelente
Review Image by José Vicente Piñeros José Vicente Piñeros
Es un excelente elegante y bello reloj...y lo mejor es Casio contramarcado Japonés. Llegó un día antes de lo previsto. Recomendadisimo.
Reviewed in the United States on August 30, 2024 by José Vicente Piñeros José Vicente Piñeros
    • Watch a YouTube video to set up - instructions are worthless!
This thing took me like 20 minutes to figure out. However it’s a great watch. I still get the buttons messed up sometimes but I got it for the most part. Have had it almost a year, it snags my arm hair pretty good sometimes but otherwise is quite the watch. The hands glow just fine, but be advised that it only lasts for about the same amount of time that you were in sunlight, so don’t expect a walk to the mailbox to be able to light up a room. Overall a great watch. ... show more
Reviewed in the United States on July 17, 2023 by Aaron
    • Fairly decent
It's a good watch and I like all the features. However the day I got it there were two issues: first the battery was nearly dead and it took 3 days of sitting it on top of a truck in full sun to finally make a dent in the charging. Second as soon as I wore it while gardening, it got a huge scratch in the face. So just keep in mind it's probably not quite as tough as you imagine. It has held a charge for a long time indoors though so I think once the charge is up it's not a problem. ... show more
Reviewed in the United States on June 1, 2025 by Peter Willis
    • Matches the description and the same one on the Casio website!
Everything functions just fine. I took it swimming in the ocean this past weekend into the waves and it’s still working just fine. It can be kind of hard to see at times because it is pretty much black on black. Just hit the light button really quick if you need to. Looks sharp and feels comfortable. ... show more
Reviewed in the United States on January 24, 2024 by Hunna04

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