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|Case Diameter||46 Millimeters|
|Band Material Type||Resin|
|Band Width||16.6 Millimeters|
About this item
- Multi-Band Atomic Timekeeping, Tough Solar Power (Approx. battery life: 9 months on full charge (without further exposure to light)
- Shock Resistant, 200M Water Resistant, Full Auto EL Backlight with Afterglow, World Time -31 times zones (48 cities + UTC)
- 1/100 second stopwatch -Measuring mode: Elapsed time, split time, 1st-2nd place times, Countdown Timer -Input range: 1 minute to 24 hours (1-minute increments and 1-hour increments)
- Accuracy: +/- 15 seconds per month (with no signal calibration)
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From the manufacturer
The most durable digital and analog-digital watches in the industry, trusted by military personnel, law enforcement, surfers and outdoor enthusiasts around the world.
Casio solar-recharging system converts even faint light from fluorescent lamps into ample energy to achieve stable operation of various high-load functions.
Pursuing Absolute Toughness
Shock-resistant construction protects against all sorts of impact and vibration.
20-bar water resistance
You can wear your G-SHOCK in all sorts of situations, from working with water in daily life and taking a shower to participating in water activities such as swimming, surfing or jet skiing.
With the EL Backlight, you can see the watch face in any situations without light.
"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.
- Product Dimensions : 4.8 x 3.2 x 2.3 inches
- ASIN : B0097LKJ90
- Batteries : 1 CR2 batteries required. (included)
- Is Discontinued By Manufacturer : No
- Date First Available : November 5, 2012
- Customer Reviews:
|Brand, Seller, or Collection Name||Casio|
|Dial window material type||Mineral|
|Case diameter||46 millimeters|
|Case Thickness||5.7 centimeters|
|Band length||9 Inches|
|Band width||16.6 millimeters|
|Special features||World time|
|Item weight||5.64 Ounces|
|Water resistant depth||660 Feet|
|Warranty||If this product is sold by Amazon, please review the manufacturer’s website for warranty information. If this product is sold by another party, please contact the seller directly for warranty information for this product. You may also be able to find warranty information on the manufacturer’s website.|
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|Shipping||FREE Shipping. Details||FREE Shipping. Details||FREE Shipping. Details||FREE Shipping. Details||FREE Shipping. Details||FREE Shipping. Details|
|Sold By||Amazon.com||Amazon.com||Amazon.com||Amazon.com||Amazon.com||Amazon Warehouse|
|Band Material Type||Resin||Resin||Resin||Resin||Stainless Steel||Resin|
|Band Size||9 Inches||Mens Standard||9 Inches||mens-standard||Mens-Standard||8 Inches|
|Band Width||16.6 millimeters||16.6 millimeters||22 millimeters||22 millimeters||16.6 millimeters||20 millimeters|
|Bezel Material Type||resin||Resin||Stainless Steel||stainless-steel||Resin||resin|
|Case Diameter||46 millimeters||46 millimeters||46.4 millimeters||42 millimeters||46 millimeters||46.7 millimeters|
|Case Material Type||Resin||Resin||Resin||Stainless Steel||Stainless Steel||Resin|
|Case Thickness||56.8 millimeters||56.8 millimeters||15.6 millimeters||15 millimeters||56.8 millimeters||43.2 millimeters|
|Clasp Type||Tang Buckle||Tang Buckle||Tang Buckle||Tang Buckle||Tang Buckle||Tang Buckle|
|Dial Window Material Type||Mineral||Mineral||Mineral||Mineral||Mineral||Mineral|
|Special Features||world-time||—||alarm-feature, chronograph, shock-resistant, water-resistant, world-time||alarm-feature, chronograph, shock-resistant, water-resistant, world-time||shock-resistant||light, chronograph, shock-resistant|
|Watch Movement||Quartz||Quartz||Japanese Quartz||Japanese Quartz||Quartz||Quartz|
|Water Resistance Depth||660 feet||660 feet||660 feet||660 feet||660 feet||660 feet|
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GENERAL: this model uses the Casio 3405 module, which it shares with other G-Shock models. English instructions came with my watch, others have said they needed to download the English instructions, which you can find here: [...]
Key features are solar charging, atomic clock sync, G-Shock build, and 200M/20Bar water resistance (good enough for professional marine activity, surface water sports; not good enough to dive with). This is NOT ISO 6425 certified as a "dive" watch. Some reviews suggest this is not as waterproof as the marketing suggests. To be safe, consider not pressing buttons underwater.
BUILD: solid - built like a tank. It has more heft than the Ironman. My Ironman had a 38mm diameter case, the GWM530A is about 46mm. As G-Shock watches go, this is actually on the smaller side (I looked at another model that had multiband WaveCeptor / Tough Solar and it was a whopping 53mm). This watch is about a centimeter thick - don't expect to slide this under fitted dress-shirt cuffs. This is the largest watch I own, and probably the largest I can pull off without looking ridiculous. For comparison, my daily dress watch is a 42mm automatic on a NATO strap. The case is chunky, dense. I like the aesthetic and the three mini-indicator circles. Not quite as retro as some of the other G-Shock watches. The indicators are, from left to right, a seconds counter, a solar charge indicator, and a multi-purpose indicator with six segments:
1) SIG - tells you if the hourly time signal is on or off
2) ALM - tells you if any of the 4 one-time alarms is currently on
3) SNZ - tells you if the 5th "snooze" alarm is on (an alarm that can be suppressed for 5 minutes at a time)
4) AutoEL - feature to automatically illuminate the face when you tilt the watch face to 40 degrees from level to view it in the dark
5) MUTE - tells you if button press "mute" is on - when off, there's a chirp when you switch modes (bottom left button).
6) DST - tells you if daylight savings time is on / off
The strap is dense, premolded (the watch won't lie flat on a table) and appears to have strong mounts/screws to the lugs. Two slightly-recessed buttons per side that sit just below the edge of the case. I really like that they're recessed by about 1mm - it avoids accidental button-presses, which was a problem I had with my Timex whenever I extended my wrist.
ToughSolar - the watch arrived partially charged. Needs a day in bright sunlight to get to "high", but once there will typically keep the charge. It will charge in cloudy light / incandescent / fluorescent bulb light, but more slowly. Charge can be assessed at a glance by looking at the middle circular indicator, which is divided into 3 zones (high, med, low). The watch has a power saving mode that you can turn on/off. In PS mode, the display will turn off when it's dark and the radio for atomic clock syncing will also turn off. I keep PS turned on, but it's never kicked in since my charge has never fallen below "medium".
WaveCeptor - Casio's name for atomic clock time syncing. There are 6 atomic clock signals across the world that this will sync with. These clocks are accurate to within 1 second every million years. So, you know, probably good enough for whatever you're doing. The one for US / North America is in Fort Collins, Colorado. There's one in China, two in Japan, one in Germany, one in the UK. As long as you're within 1500km (about 900 miles) from the European or Asian clocks, or within 3000km (about 1900 miles) from the US clock, it should sync. I am in the mid-atlantic / Delaware Valley on the east cost of the US, and it will sync fine when I put the watch by the window overnight. The watch shows the strength of the signal (L1 = weak, L2 = med, L3 = strong). I get L3 if I position it just right. You can either set the time manually or have it automatically fetch from the atomic clock. You can also manually fetch the atomic time (like, when you first get the watch). It will automatically poll the atomic clock up to 5 times at night, until its successful. The scheduled times for N. America are between 12am and 5am. Lots of reviews indicate people have issues with syncing, but Casio is very clear about why syncing works better in some circumstances than others. All I can recommend is that, if you're having trouble, you systematically go through the steps in the manual.
EL and AutoEL - the "G" button at the bottom of the face turns on the electroluminescent backlight for either 1 or 3 seconds (you choose the duration). In addition, there's an autoEL mode where, when it's dark, the gesture of moving the watch face from level to tilted by 40 degrees (basically, the gesture of tilting your wrist to see the face) will turn on the backlight. This is a very intuitive and useful feature!
Timekeeping Mode - it's a watch with AM/PM, h/m/s, month, date, and day indicator. Because of the atomic clock function, it automatically deals with leap year as well as daylight savings time (which you can also manually override). First step when you get the watch is to specify your home time zone. Also recall that the time syncs to atomic clocks between midnight and 5am. That means if the set time is way off when you get the watch, it won't sync (it will poll the atomic clock at the wrong times of day, when signal is weakest). That means you may have to manually set the time when you first get the watch, just to get it to poll the atomic clock correctly. Pressing the bottom right button toggles between either showing the date/day or a secondary time zone (world time) at the bottom of the display. Left circular indicator is a seconds indicator with 10 segments. The circle counts up 10 seconds then counts down 10 seconds. So it's a relatively easy way to visually divide a minute in multiples of 10 or 20 seconds. That being said, I don't use this indicator much.
World Time Mode - great feature. With one button press, you can switch to world time mode. The right 2 buttons move you from timezone to timezone. Up is westward, down is eastward. You can also manually set/override daylight savings time in world time mode.
Alarm Mode - individually set up to 5 alarms per day: four one-time alarms, and one "snooze" alarm. The alarm isn't super loud - don't count on this to wake you from a deep sleep.
Stopwatch mode - standard stopwatch with start, stop, split, restart, and clear.
Timer / Countdown - set a countdown timer in hours/ minutes up to 24hrs. You can't set a timer for less than a minute, in case that's an important feature you need.
This is my first G-Shock. I got this for less than $90, about twice what I paid for my Timex Ironman. But it's an amazing value - you never have to change the battery (eventually, you might have to replace the rechargeable battery), you never have to set the time/date/DST, you don't even have to press a button to view the time in the dark. Very high quality build and feels more solid/hefty than the Ironman. I think it's at the sweet spot for size at 46mm diameter - totally useable as a daily beater, not too flashy, looks dressy enough for work. If you're looking for a full-featured, shockproof, waterproof watch with solar charging / atomic syncing, consider this one.
I bought this for the Solar and Atomic time keeping capabilities, added to the g-shock ruggedness reputation.
I really like the larger digital display on this g-shock vs others. Much easier to read. The light is also better.
The buttons on the sides could be a little larger and better positioned (too close to the X axis, should be centered under their labels e.g. Adjust). Not good for timing for running, exercizing, etc. Due to this i would not catagorize this as a "sports watch".
The size is very good for my 7 inch wrists. Watch diameter and strap length are fine.
Alarm beep is too soft. Won't wake me up in the morning. This is a known problem for Casio's for a long time, don't know why they won't finally fix this.
The mini dial counting down 10 seconds is useless. The other mini dials are so small, tough to read, suggest these are deleted and moved to a separate function if i want to get the info.
So, ironman for bedside and exercizing, g-shock for other duties.
Top international reviews
The colour of watch itself is not like the picture at all - all the plastic is black including the rim around the face ( not grey ), and the display background is quite yellow. The yellow-ish background can make the display hard to read in lower light conditions.
As for function everything works as described. Radio synch works most nights ( Western Quebec ) as long as I leave it on a windowsill and orient as described in the manual. Unlike some other WaveCeptor watches I own, the level of reception is shown while it updates ( L1-L2-L3 ). The small mode dials on the face are not that useful, and can be hard to read but you don't really need to look at them very often. If you need reading glasses, you'll need them to see the dials!
There is a nice feature where you can display another world time at the bottom of the main display in place of the month-day-day of the week. Auto.el lighting works as long as you get the motion down pat as described in the manual. Watch was "low" on the charging scale when received, but moved to "mid" after a few days by a window. Haven't been outside enough to see if ever moves to "high". Power saving works like other Casio Tough Solars and shuts the display down at night.
One thing to note is the band is very specific to this family of Casio G-Shocks. I doubt an aftermarket band would work at all so you're stuck with locating and paying for a Casio replacement band - don't expect any old band will work ( although there is a similar G-Shock MTGM900DA with a metal link strap, so maybe that would be an option if available ).
If you're interested in all the bells and whistles download the 3405 manual from the Casio site for more details.
So, if you have bad eyesight you might want to go for one the similar models with a grey background ( GWM530A-1, perhaps? ) , but at the sale price I'm happy about my purchase.
Edit: Amazon seems to have updated this listing with a model with a blue-ish colored display background.. Not sure how this affects the readability but likely it is similar to the yellow background model I received. Also my watch seems to be always on H-igh charge if I leave it on a window sill - no real issue with keeping a charge.
Honestly even if it updates a couple times a week it is still extremely accurate. I haven't had any issues on the nightly updates though.
Watch has good protection for the glass and I really enjoy the top left hand circle which fills up every 10 seconds. Great for checking pulses. Also has a feature where you can set it so the back-light turns on when check your watch.
The battery life seems great so far. It takes a while to get it fully charged but it doesn't seem to drain fast either. Battery is supposed to last 9 months. Not a bad idea to put it in direct sunlight the first day or so.
If you're looking for a good work watch then I highly recommend.