





From the manufacturer

Casio Values
“Necessity is not the mother of invention, invention is the mother of necessity.” These are the words of one of Casio’s founders. The people who created Casio were determined to ‘invent necessity’- to create products that met latent needs with groundbreaking capabilities no one had ever seen before. Ever since, Casio has been doing just that, bringing new discovery and delight to people around the world. This is Casio’s way of building an even more prosperous, richly rewarding world.
Key Features

10 Year Battery
Built in 10 year battery, will provide a decade of use without the hassle of changing batteries

100 Meter (330 feet) Water Resistance
Suitable for everyday use and swimming and snorkeling

World Time
World time 31 time zones (48 cities)

LED Light
Also features 1/100-second stopwatch 1/10 second countdown timer 5 daily alarms or one-time alarms
Is Discontinued By Manufacturer : No
Product Dimensions : 5 x 5 x 0.7 inches; 1.2 ounces
Item model number : W-800H-1AVCF
Department : unisex-adult
Batteries : 1 Lithium Metal batteries required. (included)
Date First Available : November 12, 2003
Manufacturer : Casio
ASIN : B001AWZDA4
Product Warranty: For warranty information about this product, please click here. [PDF ]
Best Sellers Rank: #13,010 in Clothing, Shoes & Jewelry (See Top 100 in Clothing, Shoes & Jewelry) #27 in Men’s Wrist Watches #159 in Women’s Wrist Watches #596 in Men’s Sunglasses & Eyewear Accessories
Customer Reviews: 4.5 4.5 out of 5 stars (24,853) var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });

onwa –
Coming up on 3 years since purchase and still going strong.
Bought this 2 years and 8 months ago and it’s still great. In that time, it’s drifted 27 seconds (e.g. at 8:00:00 it now reads 8:00:27). **EDIT** This drift is inaccurate. Updated at bottom of review **END EDIT**. For me, that’s not a big deal, but figured I’d mention it. I wear the watch face-side down on my wrist, but it only accrued one mild scratch in all that time. Nothing terrible. I bought this watch because it had 3 things; the 24-hour time, the day of the week, and the date on a single screen. It’s the only watch I’ve found that had all 3 of those. To find all 3 in a highly rated and CHEAP watch? I bought it in a second and haven’t regretted it since. I actually returned a better and more expensive watch (Casio DW5600E-1V) before eventually finding and loving this. I especially love that it orders the date in Year-Month-Day format. I live in the US where Month-Day-Year is the norm, but I also work with thousands of computer files where the best way to organize files by date is with a Year-Month-Day system (e.g. 221102 for November 2, 2022). It’s just a little nothing thing, but I love this watch for it.I should note that the watch band snapped off back in August, 2 years and 5 months after getting the watch. That’s happened with other watches with resin bands that I’ve owned, always around the 2-3 year mark. I heard it’s from sweat or showers hardening the resin or something. That could make sense as I never take mine off except when I’m rock climbing. Regardless, I just grabbed a cheap 18mm silicone watch strap for 12.99 and it’s been fine ever since (bought silicone because I heard they don’t snap. I’ll update this if it ever does).I plan to use this watch forever. If it breaks, I’ll buy a new one for the price of a burger + onion rings. I’ve gone through a dozen watches over the past 25 years or so, but this is the first one that I loved. It has everything I want without a bunch of other useless expensive crap that I’ll never use (looking at you, altimeter; and that’s coming from a hiker). It’s cheap, reliable (anecdotally), has a fast band replacement process, no feature-bloat, has large text, and is DECENTLY water resistant. The only downside is that the watch isn’t 200m water resistant. If it was, it’d be perfect for me. Anyway, I don’t go surfing/swimming with it, but it hasn’t fogged up after 2+ years of showers, rain, sweat, etc. If you want a cheap watch, I recommend this one (unless you’re an avid surfer). Or if you’re like me and willing to fork over $100 for a watch, maybe buy this anyway. It’s certainly much better than the $21 price-tag would have you believe.**EDIT** 12/12/23I made the above review over a year ago, but I realized that I couldn’t verify that the 27 seconds of drift was accurate. Well, I decided to run a little experiment over the past year and record the drift every few months (basically whenever I remembered I was even doing this) and it turns out that the drift WASN’T accurate. After a year, my watch drifted 58 seconds. To get that 27 second value, I might have reset my watch whenever we had daylight saving time or something, hence the inaccurate drift. Anyway, I included the recorded values below (MM/DD/YY format) in case someone is interested. Also, I used time.gov for the baseline comparison.12/11/22 9:55PM – 0 seconds fast01/19/23 6:18PM – 5 seconds fast02/22/23 12:48PM – 10.5 seconds fast04/15/23 9:00PM – 18.5 seconds fast05/08/23 8:22PM – 22 seconds fast06/27/23 12:52PM – 30 seconds fast09/06/23 8:15PM – 41 seconds fast11/05/23 7:18PM – 51 seconds fast12/11/23 9:55PM – 58 seconds fastThis basically means my watch drifts by a little more than 1 second every week (1sec/~6.29days). For my needs, that’s fine. I’m not doing anything in my daily life that requires long-term precision to the second, and I have to reset it every so often anyway for the aforementioned daylight saving time, so I don’t mind at all. Other than that, the watch still works great (nearing 4 years now) and the “new” silicone watchband is still great too (although it hasn’t hit that 2-3 year breakdown point yet). So, all in all, still happy with it.
William Hoo –
Great Product
Great alternative to all the expensive watches now
Oscar –
Perfect for my daughter starting the NYPD academy
Bought this for my daughter who’s starting the NYPD academy — and it’s exactly what she needed. Lightweight, durable, and simple to use. It has all the features she’ll use during training and patrol: stopwatch, countdown timer, dual time, and a bright backlight for night shifts.The 10-year battery means she won’t be worrying about changing it any time soon, and the 100M water resistance is a big plus for any unexpected weather or field conditions.Reliable, no-nonsense, and built for the job — just like her.
Alan Karl Church –
Great value for the money.
Bought this as a work beater. It’s held up fine so far.(1) Not an everyday wear, as I’m just too used to analog display.(2) My one gripe is that the display doesn’t have an icon to tell you if it’s in 12H or 24H format. You only know that when either 1PM or 1300 comes around. It’s easy to bump it, and set it back to 12H, which I don’t like.(3) Pretty small, but very legible display. Well laid out.(4) I hate Casio factory straps, mostly, and this is no exception. I managed to crowd a thin nylon 1 piece onto it with some difficulty, but those springbars sit really close to the case. I pity the sales guy who has to change my battery. Lug width is 18mm. The result looks pretty good.(4) Pretty thin, compact, weighs nothing, and is one of the lowest priced 100 metre watches for sale.
Jimmy Rose –
Great Watch! Love the Black Out!
Not much of a digital watch fan but wanted one for work. Also something with a good water resistance so I can jump in a pool and not worry about what watch I have on. This was it! Casio’s in this range have a reputation for being solid, and for good reason. I love the blacked out look of mine. It can be difficult in some situations or angles to see the time clearly, but no big deal for me. Features are great. And at these prices, I’m pretty sure I’ll have a new Casio here soon again.
たかすぎ –
しっかりと箱に入って送られてきました。それだけでも気分がいいです。西暦、月、日、曜日も表示され、時間も見やすく、さらに10気圧防水、チプカシの中では大満足です。気兼ねなく使えますし。使い倒そうと思いますw
Soran –
Beste
zeezar –
أصلية والشاشة مناسبة
Julien klamber –
Très bien fonctionne très bien comme dans le temps
マアヤ –
軽くて丈夫ですごく使いやすい。欠点を1つ挙げるとすれば、バックライトの時間が短すぎる以上。