Casio ProTrek PRG-330 — Simple Sport Design with Solar Power

Rating: 4 out of 5.
Battery Years★★★★★
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Detailed PRG-330 technical specs are here →

About PRG-330 in Short. The ProTrek travel budget series with a triple sensor and digital display. The bezel in this model is aluminium – now the case not only looks more solid but has become stronger. Advanced filling PRG-330 includes a barometer for measuring atmospheric pressure, a thermometer and a digital compass. Each of the listed functions has a separate quick launch button. The display and case are resistant to low temperatures – the manufacturer guarantees stable operation of the watch at -20 ° C. Thanks to solar power, you can forget about the periodic replacement of the battery. The basic functionality is represented by a stopwatch, timer, world clock, and alarm clock.

General Information

Price200$  *average Amazon Price, we may earn commission from purchases
Year of First Release2019
Model RangeSOLAR
Battery Type Solar (ProTrek Batteries)
  • 3443
  • (official)

    PRG-330 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. Stay one step ahead of Mother Nature with the Solar Powered PRG300-4A, incorporating Casio’s 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. Design features include a compact, sleek case and soft urethane band for a better fit to the wrist. One-touch access to digital compass, barometric pressure/altitude, and temperature readings keep important information at your fingertips.

    Official PRG-330 Specs / Features *for base version PRG-330-1

    • Full-Auto LED light
      A twist of the wrist in weak light conditions automatically lights up the display backlight.
    • Low-temperature resistant (-10 °C)
      Even temperatures as low as -10 °C have no effect on this watch.
    • Solar Power
      A solar cell provides power for operation.
    • Digital-compass
      A built-in direction sensor detecs the magnetic north.
    • Barometer (260 / 1.100 hPa)
      A special sensor measures the air pressure (measuring range: 260 / 1100 hPa) and presents this on the display in the form of a symbol. This enables early detection of weather trends.
    • Thermometer (-10°C / +60°C)
      A sensor measures the ambient temperature around the watch and displays it in °C (-10°C /+60°C).
    • 10,000 m Altimeter
      A pressure sensor detects changes in the air pressure and converts the result into an altitude up to 10,000 m.
    • Height Gain
      The height gain sums all the meters you have climbed in a session, so that you can see at a glance the total ascent on a tour.
    • Altimeter data memory
      Depending on the model, up to 40 sets of elevation data can be stored in the watch’s data memory and re-accessed at any time. Each of these data sets consists of a measured altitude as well as the date and time. In addition to the individual altitudes, the maximum and minimum altitudes during a measurement are also stored.
    • Sunrise/sunset display
      After entering the geographical location, sunrise and sunset times can be displayed for any given date.
    • World time function
      Displays the current time in major cities and specific areas around the world.
    • Stopwatch function – 1/10 sec – 1.000 hours
      Elapsed time, split time and final time are measured with 1/10-sec accuracy. The watch can measure times of up to 1000 hours.
    • Timer – 1/1 min. – 24 hours
      For fans of precision: the countdown timers help you to remember specific or recurring events by giving off an audible signal at a preset time. The time can be set to the nearest minute and up to 24 hours in advance. Ideal for people who need to take medicines every day or those who do interval training.
    • 5 daily alarms
      The daily alarm reminds you about recurring events with an acoustic signal at the time you have set. This model has 5 independent alarms for flexible reminders of important appointments.
    • Snooze feature
      Each time you stop the alarm, it sounds again after a few minutes.
    • Button tones on/off
      The button tones for using the mode button can be turned off. This means that the watch no longer beeps when switching from one function to another. Preset alarm or countdown timers remain active when the button tones are deactivated.
    • Automatic calendar with Date, Day and Month
      Once set, the automatic calendar always displays the correct date.
    • 12/24-hour timekeeping
      Times can be displayed in either a 12-hour or 24-hour format.
    • Mineral glass
      The tough mineral glass resists scratching.
    • Resin case
    • Resin band
      Synthetic resin is the ideal material for wrist straps thanks to its extremely durable and flexible properties.
    • Buckle
    • Battery level indicator
      An indicator shows the current battery level.
    • Water resistance classification (10 bar)
      Perfect for swimming and snorkelling: the watch is water resistant to 10 bar according to ISO 22810.
    • Dimensions (H x W x D)
      56mm x 47,1mm x 12,7mm
    • Weight
      approx. 60 g

    ProTrek PRG-330 on the wrist!

    Feedback from users *accumulated information from our own comments and emails, forum threads, socials, reviews, etc.

    + sunset time and compass and easy to navigate
    + no fog on/in the dial in water nor in very low temperature
    + this ABC (altimeter barometer, compass) watch has so many functions
    + is super comfortable
    + able to enter my geo coordinates for accurate sun rise/set times. Really useful when backpacking far from home, in subfreezing temperatures
    + it’s a cute baby pink and it isn’t tiny but it isn’t overly large. It’s a sporty looking watch
    + solar charged, no dead batteries!

    – the coating is either coming off or getting dirty quickly
    – the face is a bit big (It hits my wrist and pushes the side button sometimes stopping the timer)

    The most distinctive specs of PRG-330 *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)
    — 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)
    Altimeter data memory (Depending on the model, up to 40 sets of elevation data can be stored in the watch’s data memory and re-accessed at any time)
    Sunrise/sunset display (After entering the geographical location, sunrise and sunset times can be displayed for any given date)

    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-330 Comparison Table with similar ProTrek Watches


    Price (Amazon)

    Year of first Release




    Radio-controlled (via atomic watch signals)

    ±15 seconds per month

    Radio-controlled (via atomic watch signals)

    SmartWatch Features




    STN LCD (more distinct and bigger digits)




    Cross-Frame Structure (disperses impacts, reinforcing the case’s)




    Moon Data (good for fishing and tides)





    LED backlight (Super illuminator)

    Full-Auto LED light

    Super-Full-Auto LED light (If the ambient light fades, a turn of your wrist illuminates the watch display particularly brightly.)

    Case / bezel material

    Resin / Stainless steel

    Resin / Aluminum

    Resin / Stainless steel


    Mineral Glass

    Mineral glass

    Mineral glass


    Solar powered

    Solar powered

    Solar powered CTL1616

    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!

    ProTrek Philosophy. 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!

    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.

    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.

    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.

    Digital Compass.
    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-330 

    All Casio PRG-330 News →

    You ask, we answer…

    What does Tough Solar in PRG-330 mean?

    CASIO’s original solar-charging system converts not only sunlight but also light from fluorescent lamps and other sources into power.

    What is Altimeter in PRG-330?

    It’s the electronic mechanism that “estimates” the altitude based on the air pressure.

    How does Digital compass in PRG-330 work?

    It measures and displays direction as one of 16 points.

    What does Barometer in PRG-330 do?

    It measures the air pressures and displays tendencies in the weather.

    Can’t find a ProTrek of your dream? There are more watches!

    Back to all ProTrek Models

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