Pro Trek Bio Mass Tough Solar Watch

SKU: PRG340-1

Rated 5.0 out of 5
Based on 4 reviews
$599.00 AUD $349.00 AUD

or make 4 interest-free payments of $87.25 AUD fortnightly with or or own it for $10 per week with

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Make your outdoor adventures eco-friendly with the Casio Pro Trek Bio Mass Tough Solar Watch PRG340-1. This timepiece is a champion of both style and sustainability, designed with the nature lover in mind.

Environmentally-Friendly Materials

Notably, the Pro Trek PRG-340 is constructed from biomass plastics. This innovative material is derived from renewable organic substances such as castor oil and corn. By choosing a watch made from this bio mass material, you're helping to reduce environmental impact and promote a more circular economy.

Solar-Powered Performance

Embrace the power of the sun with the Pro Trek's Tough Solar charging system. This ensures that your watch remains functional and efficient, no matter how far your adventures take you.

Advanced Functionality

  • Duplex LCD: The watch features a duplex LCD that presents separate layers for compass graphics and clock functions. This results in a larger compass display for better legibility and easier navigation.
  • Rotating Bezel: The convenient rotating bezel simplifies the task of recording compass readings.

With its beautiful design combined with functionality, the Casio Pro Trek Bio Mass Tough Solar Watch PRG340-1 propels you to explore the great outdoors, leaving a gentler footprint. It's not just a watch, it's a commitment to the environment.

Feature Overview


2 Years


Casio Box

Case Size




Glass Material

Mineral Crystal



Water Resistance

100 Meters

Band Type

Black Biomass Plastic


Case size (L× W× H): 54.7 × 51.7 × 15.1 mm
Weight; 54 g
Case and bezel material: Case / bezel material: Biomass plastics
Band: Soft urethane band (biomass plastics)
Water resistance: 100-meter water resistance
Environmental resistance: Low-temperature resistant (-10℃/14℉)
Power supply and battery life: Solar powered
Sensor feature:
Measuring range: -700 to 10,000 m (-2,300 to 32,800 ft.)
Measuring unit: 1 m (5 ft.)
Manual memory measurements (up to 30 records, each including altitude, date, time)
Auto log data (High/low altitudes, auto cumulative ascent and descent)
Trek log data (up to 14 records of high/low altitudes, auto cumulative ascent and descent of particular treks)
Others: Relative altitude readings (-3,000 to 3,000 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)
Atmospheric pressure tendency graph (Past 42 hours of readings)
Atmospheric pressure differential graphic
Barometric pressure tendency information alarm (beep and arrow indicate significant changes in pressure)
*Changeover between hPa and inHg
Digital compass
Measures and displays direction as one of 16 points
Measuring range: 0 to 359°
Measuring unit: 1°
60 seconds continuous measurement
Graphic direction pointer
Bidirectional calibration
Magnetic declination correction
Bearing memory
Display range: -10 to 60℃ (14 to 140℉)
Display unit: 0.1℃ (0.2℉)
*Changeover between Celsius (℃) and Fahrenheit (℉)

Glass: Mineral Glass
Bezel features: Direction Bezel
Compatible band size; 145 to 215 mm
World time: 31 time zones (48 cities + coordinated universal time), daylight saving on/off
Sunrise/sunset display: Sunrise, sunset time display/Sunrise time and sunset time for specific date, daylight pointers
1/10-second stopwatch
Measuring capacity: 999:59'59.9''
Measuring modes: Elapsed time, split time, 1st-2nd place times
Countdown timer
Measuring unit: 1 second
Countdown range: 24 hours
Countdown start time setting range: 1 minute to 24 hours (1-minute increments and 1-hour increments)
Alarm/hourly time signal:
5 daily alarms (with 1 snooze alarm)
Hourly time signal
LED backlight (Super Illuminator)
Full auto LED light, selectable illumination duration (1.5 seconds or 3 seconds), afterglow
Light color: LED:White
Calendar; Full auto-calendar (to year 2099)
Mute feature; Button operation tone on/off
Energy saving feature: Power Saving (display goes blank to save power when the watch is left in the dark)
Battery display/alert: Battery level indicator
Run time:
Approx. battery operating time:
7 months on rechargeable battery (operation period with normal use without exposure to light after charge)
27 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)
Accuracy: Accuracy: ±15 seconds per month
Other features:
12/24-hour format
Regular timekeeping:
Hour, minute, second, pm, month, date, day
Duplex LC display


average rating 5.0 out of 5
Based on 4 reviews
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100% of reviewers would recommend this product to a friend
Review posted
Reviewed by Jacob H.
Verified Buyer
Rated 5 out of 5

Amazing watch

So light and so reliable, came quickly and is better than advertised

I recommend this product
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Review posted
Reviewed by Steven S.
Verified Buyer
Rated 5 out of 5

Casio Pro Trek PRG340-1

Easy transaction and great price. Highly recommend Watch Direct. Thanks AAA+++

I recommend this product
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Review posted
Reviewed by Anthony M.
Verified Buyer
Rated 5 out of 5

pro trek watch

excellent just like my original

I recommend this product
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Review posted
Reviewed by Mitchell H.
Verified Buyer
Rated 5 out of 5

I am very pleased with my watch

It is very well-made

I recommend this product
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Shipping & Returns

Free Shipping Anywhere In Australia

    • Most orders ship within 24 hours.
    • Same Day Delivery available in Sydney, call us on 1300 725 644 for details.
    • Signature on Delivery is included on all shipments within Australia.  We ship with AusPost and StarTrack.
    • DHL Express is available for fast and secure international shipments.

    View our Shipping Page for More Information

    Easy 30 Day Returns
    To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase.

    View our Returns Page for More Information

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