- Tough Solar Power, 100M Water Resistant, Low Temperature Resistant (-10 C / 14 F), Altimeter, Digital Compass, Barometer, Thermometer
- Storage Battery: Solar Rechargeable Battery, Battery Level Indicator
- Power Saving Function, Approx. Battery Life: 9 months on full charge (without further exposure to light), Module 3415
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Introducing the Solar Powered PRG270 which incorporates Casio's new Triple Sensor Version 3 engine. Advanced CASIO original technology has allowed for a 95% smaller direction sensor and 90% reduction in sensor power consumption compared to previous models. Despite their smaller size, the new sensors in this model deliver better accuracy and energy efficiency. This model can measure Altitude in 1m increments (previously 5m) and display compass readings with 60-seconds of continuous measurement (previously 20 seconds). In addition to the altimeter and digital compass, the watch's Barometer, incorporates a unique Barometric Pressure Tendency Alarm that alerts the wearer to sudden changes in pressure readings.Design features include a case designed for outdoor gear performance. Large side buttons and one-press access to digital compass, barometric pressure and altitude, and temperature readings keep important information at your fingertips. Other features include Tough Solar, 100-meter water resistance, and more. Everything about these models is designed and engineered to make them essential pieces of outdoor gear. Black resin band digital with neutral face.
With the launch of its first watch in November 1974, Casio entered the wristwatch market at a time when the watch industry had just discovered digital technology. As a company with cutting-edge electronic technology developed for pocket calculators, Casio entered this field confident that it could develop timepieces that would lead the market.
Today, Casio is focusing its efforts on solar-powered radio-controlled watches: the built-in solar battery eliminates the nuisance of replacing batteries, atomic timekeeping means the users never have to reset the time. Recently, Casio launched a series of Bluetooth watches that sync to the users cell phone to automatically update the time. Casio is always moving time forward.
- Product Dimensions: 0.6 x 0.6 x 0.6 inches
- Shipping Weight: 12 ounces (View shipping rates and policies)
- ASIN: B00ENCRBO4
- Item model number: PRG-270-1
- Batteries: 1 Nonstandard Battery batteries required. (included)
- Date first available at Amazon.com: November 17, 2009
- Domestic Shipping: Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.
- International Shipping: This item is not eligible for international shipping. Learn More
- Average Customer Review:
|Brand, Seller, or Collection Name||Casio|
|Dial window material type||Mineral|
|Case material||Stainless steel|
|Case diameter||5.2 centimeters|
|Case Thickness||14 millimeters|
|Band width||21 millimeters|
|Calendar||Day and date|
|Special features||Compass, measures-seconds, Light, Stop watch|
|Item weight||11.20 Ounces|
|Water resistant depth||330 Feet|
Top customer reviews
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The PRG270 is smaller than some of the older Protrek models, due to the smaller sensor, and they have moved the sensor location from the 10 o'clock to the 9 o'clock position. The triple sensor makes these watches sometimes called ABC watches as they have Altitude, Barometer & Compass readouts. The smaller design makes it easier to wear everyday, however the face is still relatively busy, with the case having front raised sections (at the 12, 3, 6 & 9) with indents. The sensor at the 9 o'clock position sits higher than the raised section at the 3 o'clock position. The crystal is recessed nicely as usual on Casio G-Shocks and Protreks.
I wish the design could look more like the PRW3000, which is cleaner and more stylish IMHO Casio Men's PRW-3000-1ACR Protrek Digital Display Japanese Quartz Black Watch, but is also 3 times more expensive. The display is similar to the other Protreks, divided into three sections. The top section has a dotmatrix display and can show the date, or altitude/barometric graphs, the middle section is the time, and the lower section is the seconds.
The watch is light, mine weighs about 67 grams (2.36 ounces), and has 10Bar water resistance, which means it is ok in a rain shower, or shallow swim, but it wouldn't be ok with a scuba dive. I have only had this watch in the rain, and it functions fine.
One issue with the PRG270 is the strap uses a 18mm spring lug, so if you wanted to put a wider Nato/Zulu strap, you'd need an adapter.
- EL backlight, this is nice and bright, and the EL button is still on the front, they have moved the adjust button on older Protreks from the front to the 10 o'clock position. You can still set this for Automatic, and set it for 1 or 3 second display.
- Date display - on the Time display, you can change date to Day&Date, or Month&Date, or Barometric Graph only (no date).
- Setting time - this is a breeze. when you get the watch is preset to Tokyo time. Changing the Time zone to your location, and checking if Daylight Saving Time (DST) applies, and voila - the time is set and easy to change if you travel. The secondary timezone is set by picking various preset cities. I have not had any issue with the time accuracy so far.
- Stopwatch/Countdown TImer (24 hours max)/Alarm - All standard, but the alarm lets you have 5 individual alarms, and the alarm is louder and longer than my Suunto Core watches.
- Sunrise/Sunset - this is also a breeze to set. The PRG270 lets you input the longitude and latitude of your location for accurate sunrise/sunset times. Compared with my Suunto Core watches which only lets me choose nearest cities.
- Power save - I have set this to on, and the watch will display will go off overnight, or after a period of unuse to conserve battery. You can wake it up by pressing any button.
Altimeter/Barometer (This is from my previous reply comment to a review on the altimeter readings)
All altimeter watches without GPS embedded will calculate the estimate of altitude by changes in air (barometric) pressure.
Air pressure can change due to many things, like change in elevation, change in weather, your physical location and wind. So for example, if you get a low pressure system coming through over night, while you leave your watch on the table, it could appear that you have ascended a few hundred feet in your sleep. Similarly, if you take the watch on a commercial airplane, it will not give you a reading on the actual altitude, but a lower altitude, based on the pressure within the cabin. If you fly in an unpressurized aircraft, it will give you a more accurate altitude reading. I have taken a Suunto Core with me when I've been in a few prop aircraft, and used it as a secondary altimeter in skydiving, and it has been fairly accurate after calibration. I'll take the Casio up next time and see how it goes.
Also, I have found that the altimeter and barometer readings tend to vary with temperature, and gives marginally more accurate readings off the wrist especially if I have been hiking and my wrist is warm.
I also have a few Suunto Core watches, and the Suunto Core is quite clever in the way it calculates the altitude. If you leave it in altitude logging, it will gain elevation as you physically climb up, as the barometric pressure changes faster than it does when the weather changes, so it realises you are climbing. But once you stop climbing for a while, it realises this and any slight air pressure changes it takes as weather change, and not altitude gain or loss. The Casio doesn't have this feature.
For accurate altimeter readings you still need to calibrate your altimeter watch to your reference altitude on a fairly regular basis. I do this when I want to log altitudes before a hike/climb. An easy way to do this is to check Google Earth which gives accurate altitude readings when you put your location. You can then calibrate the barometric pressure from your local meteorology service (I take mine from their website on the day I calibrate).
If kept properly calibrated during a day that has fairly stable weather, they should prove to be very accurate overall. In varying weather conditions, you will see some variation. Again, it's essential to know the reference altitude to get back on track.
Still, this can vary, and the altimeter watch is not a scientific instrument, but only designed to give you an estimate on current altitude. For example, on a recent trek to Mt Everest Base Camp, I ran a few loggers, including a barometric altimeter, and on the return trek later in the day because I was exhausted, I didn't recalibrate the altimeter at the known peak height, the altimeter log showed an altitude difference of about 10 metres (see here imgur.com/8XrW0iD)
So if you are after an altimeter watch for accurate altitude readings at specific location, without daily calibration, the Casio PRG 270 it is not the right tool for you.
The accuracy of the altimeter when properly calibrated is pretty close when I've compared it with my Suunto Core watches, Garmin handheld GPSs and altitude markers on trails. I usually the watch strapped to my backpack strap when hiking, so it doesn't get thrown out by my body temperature.
Also, I haven't checked how fast the altimeter updates. It seems ok for hiking, but I haven't taken readings and monitored it while bike riding for example. The newer V3 Sensor has reduced the time required to measure altitude from 5 seconds previously to 1 second now, and the altitude measurement unit has been improved from five metres to one metre.
The temperature reading in the barometer was pretty accurate, but I've noticed it can get wierd with rapid changes in temperature. For example, if you have left the watch by the window to solar charge, the temperature will be wrong for about half an hour until the watch and sensor cools down, and you get a more accurate measurement. You should only calibrate the temperature when the watch has cooled to normal temperature, and I have done this with a high accuracy thermometer. The temperature reading it gives includes 1 decimal place. In my Suunto Core, it only displayed the nearest degree, but after calibration, both Suunto watches and the PRG270 are pretty accurate on temperature off wrist.
Altimeter logs - the watch has enough memory to store 30 logs, and 14 trek logs, but I think the Suunto is better here as it can record more.
As with all electronic compasses, it will get interferences from other magnetic sources, and may not be accurate on boats, planes, trains, or even in some buildings where the ferroconcrete magnetism causes inaccurate readings. That said, I have had good experiences with the compass, in those conditions. The magnetic compass can be set for magnetic declination, and you can still display the time in Compass mode. The top section can be set to display the bearing (0°-360°) or the direction (N,S,E,W, etc).
You have to have the watch level with the ground to get an accurate compass reading, and it is easy to calibrate by holding the adjust button down. You should only calibrate when way from other magnetic sources. I do this when I'm starting a hike, away from the car, but always carry a real compass and maps if going out bush.
If you leave it in compass mode it will stop the compass to save battery.
Overall, for the price, this is a very good triple sensor watch that because of the smaller size from previous Protreks you can use for everyday wear. If you understand the limitations of ABC watches (they are not intended as precision instruments), this is a great first ABC watch.
+ Price: An ABC protrek, with solar power, and V3 sensors for $115? Good luck matching this one. Amazon's price is by far the best; There are quite a few places out there where you could find a watch not as well equipped for much more...
+ Features: the usual of a good ABC watch; nothing really missing as far as functionality is concerned. A lot of customization is possible
+ Display: I went for the dark over light background; there's a different version that has an inverse display but I didn't want to take the risk of poor legibility in bright light (Suunto is notorious for this...)
+ Pretty Intuitive for a First time ABC user: you've got to read the manual to figure out the basic operation of the watch. Once you spend 10-15 minutes playing, everything kind of falls into place. I'm sure former Casio user can skip this step
+ Battery life: pretty happy with the solar charge. Had the watch for 2 weeks in a drawer, it's still at the max level of battery
= Size: the watch is bulky; weight is acceptable (we're talking about a $115 watch so don't expect ultra-light). I've got wrists smaller than the average guy - it is however very wearable as the band is easy to adjust.
= Band comfort: the band is stiff right off the box; given how thick it is, I don't expect it to loosen much, unfortunately. I haven't found too many instructions as to how to replace the band, say with NATO.
- Not atomic: not a big deal for me, may be for others
- Some of the indications are really, really small and hard to read (like units and a few other symbols). I've got a really good sight and I'm sometimes struggling. This won't matter after you configure the watch though, since you'll remember your settings
A few additional notes: the thermo and alti function will be inaccurate due to inherent design choices made by Casio. I'm not saying these are flaws but I always come accross the occasional comment that mentions that the readings are off.
For the temp: body heat WILL alter the reading. For an accurate reading, take the watch off your wrists, for a few minutes, then take a reading (if it's a hot and sunny day, make sure that the watch is in the shade)
For the alti: because the watch uses atm pressure readings to derive alti, your readings are essentially dependent on the weather. Make sure your calibrate accordingly, but don't rely too much on this. In complement, use your nav skills and your GPS.
Overall, a great watch for a really good price. In my (long) search for a rugged watch, I haven't comme accross any watch that matched this very model. G shocks are out of the equation since not ABCs; Suunto are more expensive and flawed with annoying issues (see Suunto core display or waterproofing).
Just remember that the sensors in this watch are ANALOG sensors and are subject to the ANALOG environment around it. If you are going to use it for hiking, traveling, or any kind of recreation, just remember to check and adjust the watch at known reference points often.
As for the watch its self, I think it says all that I have to say about them, with this being my third one.