Detailed PRG-650 technical specs are here →
About PRG-650 in Short. Representative of the latest generation of ProTrek for travel. The external feature of the model can be called a concise and compact design – the case has become much thinner, and the placement of elements on the display has become more rational and convenient. Ana-DJ dial not only adds a bit of “classic” to the watch, but also visually separates the digital functionality from the analogue. The case is resistant to low temperatures – the manufacturer guarantees stable operation of the watch at temperatures up to -20 ° C. The watch has a triple sensor for measuring atmospheric pressure, air temperature and directions relative to magnetic north. Dual illumination Neon Illuminator illuminates not only analog but also digital zones. The strap is made of soft but durable silicone, with a luminescent coating – will glow in the dark. For quick access to watch functions, the Smart Access crown is provided.
|Price||470$ *average Amazon Price, we may earn commission from purchases|
|Year of First Release||2017|
|Battery Type||Solar (ProTrek Batteries)|
PRG-650 Model Range *may be updated
*Want to be the first to know about new ProTrek Updates? Here we store all recent Monthly ProTrek Updates →
Official Description from Casio. Introducing new night safari concept models for the lineup of Triple Sensor Version 3 PRO TREK models.
The colors and designs of these three new models all were specially selected for the night time outdoor scene.
The outside of the bands and the faces of all three models are black. The designs of these models are stylish and subdued, without sacrificing the readability required during night time activities.
The PRG-650/650Y models come with DURA-SOFT bands that incorporate silicon materials that improve durability. The inside of the band is luminescent, so it emits a faint glow during night activities.
Function-wise, all three models are equipped with Neon Illuminator to provide easy reading of the time and function modes, even in the dark. Other basic functions include Triple Sensor (bearing, altitude/barometric pressure, temperature), one-touch measurement button, Tough Solar, and more. Movable lug components add to a better fit and more comfort.
Everything about these models is designed and engineered to create functions and designs for night time outdoor activities.
Official PRG-650 Specs / Features *for base version PRG-650-1
- Case / bezel material: Resin / Stainless steel
- Silicon band
- Mineral Glass
- Screw Lock Crown
- 100-meter water resistance
- Double LED light
LED light for the face (Full auto LED light, Neon illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
LED backlight for the digital display (Full auto LED light, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
- Solar powered
- Low-temperature resistant (–10°C/14°F)
- The auto hand home position correction
- Digital compass
Measures and displays direction as one of 16 points
Measuring range: 0 to 359°
Measuring unit: 1°
60 seconds continuous measurement
Hand indication of north
Magnetic declination correction
Measuring range: –700 to 10,000 m (–2,300 to 32,800 ft.)
Measuring unit: 1 m (5 ft.)
Hand indication of altitude differential
Manual memory measurements
(up to 30 records, each including altitude, date, time)
Auto log data (High/low altitudes, cumulative ascent and descent)
Others: Relative altitude readings (±100 m /±1000 m), Selectable measurement interval: 5 seconds or 2 minutes
*1 second for first 3 minutes only
*Changeover between meters (m) and feet (ft)
Display range: 260 to 1,100 hPa (7.65 to 32.45 inHg)
Display unit: 1 hPa (0.05 inHg)
Hand indication of pressure differential
Atmospheric pressure tendency graph
Barometric pressure tendency information alarm (beep and arrow indicates significant changes in pressure)
*Changeover between hPa and inHg
Display range: –10 to 60°C (14 to 140°F)
Display unit: 0.1°C (0.2°F)
*Changeover between Celsius (°C) and Fahrenheit (°F)
- World time
29 time zones (29 cities + coordinated universal time), One-touch UTC Time Zone Access, daylight saving on/off, Home city/World time city swapping
- 1/100-second stopwatch
Measuring capacity: 23:59’59.99”
Measuring modes: Elapsed time, split time, 1st-2nd place times
- Countdown timer
Measuring unit: 1 second
Countdown range: 60 minutes
Countdown start time setting range: 1 second to 60 minutes (1-second increments, 1-minute increments)
- 5 daily alarms
- Hourly time signal
- Hand shift feature (manual or auto (during altitude, barometric pressure, and temperature measurement))
- Battery level indicator
- Power Saving (display goes blank and hands stop to save power when the watch is left in the dark)
- Full auto-calendar (to year 2099)
- 12/24-hour format
- Button operation tone on/off
- Regular timekeeping:
Analog: 3 hands (hour, minute (hand moves every 10 seconds), second)
Digital: Hour, minute, second, am/pm, month, date, day
- Accuracy: ±15 seconds per month
- Approx. battery operating time:
7 months on rechargeable battery (operation period with normal use without exposure to light after charge)
25 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)
- Size of case : 51.6×51.5×13.4mm
- Total weight : 80g
ProTrek PRG-650 on the wrist!
Feedback from users *accumulated information from our own comments and emails, forum threads, socials, reviews, etc.
+ one of the most great outdoor watch
+ very comfortable to wear
+ nice looking watch
+ the luminescent bands on the Night Safari editions
+ Solar charging feature is however a Great plus
+ the power saver feature
– the minute hand of chronograph is not as seen in picture and also not properly synced with the markings
– the needle appears to be slightly backwards
The most distinctive specs of PRG-650 *Editorial
— 100-meter water resistance (good for swimming but not for deep diving)
— Tough Solar (CASIO’s original solar-charging system converts not only sunlight but also light from fluorescent lamps and other sources into power)
— Low temperature resistant (stable operation of the watch is guaranteed even at a temperature of -20°C)
— Digital compass (measures and displays direction as one of 16 points)
— Thermometer (can measure and display the outside temperature in a range from -10 C to 60 C)
— Barometer (measures the air pressures and displays tendencies in the weather)
— Altimeter (The electronic mechanism “estimates” the altitude based on the air pressure)
— Double LED light (LED light for the face and LED backlight for the digital display)
— Smart Access (the system for analogue movements achieves multi-functionality and easy operability simultaneously through a combination of multiple motors and an electronic crown)
— Luminescent band and hour markers
Other ProTrek PRG Watches *similar by price and functions but different by cases
These are not all ProTrek PRG Series. Here is a list of All ProTrek PRG Watches →
PRG-650 Comparison Table with similar ProTrek Watches
Year of first Release
±15 seconds per month
Radio-controlled (via atomic watch signals)
±15 seconds per month
STN LCD (more distinct and bigger digits)
Cross-Frame Structure (disperses impacts, reinforcing the case’s)
Moon Data (good for fishing and tides)
Neobright and Double LED light
Neobright and Double LED light
Neobright and Double LED light
Case / bezel material
Resin / Stainless steel
Resin / Stainless steel
Resin / Stainless steel
Sapphire crystal Glass
Size (mm) *we consider 48.9×42.8×13.4 to be a traditional watch size (as in DW-5600). So you are to compare how far or close the watch is to this size
Full features (if you want to know more)
Enjoy Japanese approaches to Travel and Functional ProTrek Watches!
Every adventure needs a reliable partner. PRO TREK is exactly the kind of watch that you need to meet the demands of your interests. PRO TREK is equipped with functions such as solar power operation, a digital compass, an altimeter, a barometer and a thermometer. The combination of innovative technology, a robust precision movement and state-of-the-art design makes the PRO TREK the perfect companion for all adventures under the open sky. Mountain or valley? Forest or meadow? River or lake? No matter what awaits you, you will be well-prepared to make any rough terrain your own thanks to the PRO TREK.
Experience for yourself how PRO TREK opens up new horizons while always pointing you in the right direction!
Tough Solar. The CASIO Tough Solar System is now so advanced that even the weakest light sources are sufficient to operate the watches. The solar cells are so small and inconspicuous that they can be integrated easily into every watch face design.
An accumulator in solar watches saves “superfluous” energy and releases it when the watch is in darkness. The accumulator is charged automatically and does not require manual activation.
Quick Access to Important Functions
With its electronic crown, the innovative Smart Access system provides intuitive access to key functions. By rotating and pressing the crown, the user can switch between individual features such as the altimeter or alarm, and settings can be adjusted quickly and directly. The Smart Access system is protected by a crown switch locking feature, preventing the watch from switching unintentionally to another mode.
Triple Sensor. PRO TREK watches are equipped with the latest Triple Sensor, version 3 technology, making them even more accurate than before. Three highly sensitive, extremely small sensors measure with absolute precision and instantly display changes in your environment. The precision of the digital compass, altimeter, barometer and thermometer is only possible with the Triple Sensor technology. At the same time, the three layer sensor is 95% smaller and consumes 90% less energy than before.
Altimeter. For all those who set their sights high
The built-in altimeter uses a pressure sensor to measure the current air pressure.
The measured air pressure is then used to provide an “estimate” of the current altitude.
The electronic mechanism in the watch is pre-programmed with “ISA values” (“International Standard Atmosphere”) used to convert pressure values into altitude values.
The air pressure and temperature generally become lower as the altitude increases.
These values define the connection between altitude, air pressure and temperature.
Barometer. The barometer measures the air pressures and displays tendencies in the weather.
The higher a person goes (ascent/terrain), the lower the barometric pressure will be.
An increase in air pressure usually signifies an improvement in the weather.
A decrease in air pressure usually means that bad weather is on its way.
The air pressure is displayed with an accuracy of 1 hPa (hectopascals).
The barometer can measure and display a range from 260 hPa to 1100 hPa.
The PRO TREK digital compass shows 16 compass points. The direction of magnetic north and the bearing are calculated by the compass’s directional sensor The directional sensor consists of two rectangular coils that detect slight tensions created by the earth’s magnetic field. Depending on the position and direction, these tensions vary in intensity. There is a non-magnetic resistance between the two coils, which absorbs the subtle changes in tension. With each new position, the values that are measured by the resistance change. A microprocessor converts the measurements so that they can be displayed clearly on your watch.
Thermometer. The thermometer is used to measure the outside temperature.
The temperature is displayed with an accuracy of 0.1 °C.
The thermometer can measure and display a range from -10.0°C to 60.0°C.
The watertightness of the CASIO watches complies with DIN 8310 and ISO 22810. These standards describe the various classes of watertightness and the test procedure used to determine watertightness.
These standards apply to the general wristwatch usage. Watches with metre indications for watertightness cannot be used immediately in this water depth, however, as water resistance metre indications are merely a pictorial representation of the test pressure. A wristwatch withstands the impact of water at the static pressure specified on the watch (e.g. 10 bar) and the theoretical immersion in water to the specified depth.
Recent News about PRG-650
- [Live Photos] ProTrek PRG-650YBE-3 and WINTER HIKING SAFETY TIPS
- [Live Photos] ProTrek PRG-650-1E with Neon Illuminator and Silicon Band
- [Live Photos] ProTrek PRG-650YBE-3E with Military Cloth Band
- [Live Photos] ProTrek PRG-650-1 — Neon Illuminator and Luminous strap
- [Video] ProTrek PRG-650 Product Video
- [ProTrek Review] PRT-B50-4ER – when the watch writes history from a blank slate
- [ProTrek Review] PRW-50Y-1B — Retro Tourist Watch
- [ProTrek Review] PRW-60FC-1A — black beauty with a composite band
You ask, we answer…
CASIO’s original solar-charging system converts not only sunlight but also light from fluorescent lamps and other sources into power.
It’s the electronic mechanism that “estimates” the altitude based on the air pressure.
It measures and displays direction as one of 16 points.
It measures the air pressures and displays tendencies in the weather.
Can’t find a ProTrek of your dream? There are more watches!