Casio ProTrek PRG-300 Series

Inexpensive ProTrek with the latest generation triple sensor and compact round case. With relatively small dimensions of the case, the module is still advanced – the sensor includes a barometer / altimeter, a thermometer and a digital compass. Solar power completely removes the issue of periodic battery replacement [at least for the first ten years]. The digital display is divided into separate zones to display different information – the current time, date and additional indicators. The barometer, thermometer and compass are activated at the touch of a button for convenient use of the watch. The housing is resistant to low temperatures [up to -20 ° C]. The basic capabilities of the PRG-300 are standard – stopwatch, timer, alarms, world clock and calendar.

Important Information

  • Price — 190$ *average Amazon Price, we may earn commission from purchases
  • Year of first Release —  2015
  • Module Number — 3443
  • Model Range — SOLAR
  • Other Divisions the PRG-300 belongs to: *you may find all watches of the division by clicking on the link
  • Battery Type — Solar (ProTrek Batteries)

Official Marketing Focus from Casio

Stay one step ahead of Mother Nature with the Solar Powered PRG300, incorporating 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 delivers 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.

Official PRG-300 Specs / Features *for base version PRG-300-2

  • Mineral Glass
  • 100-meter water resistance
  • Case / bezel material: Resin
  • Resin Band
  • LED backlight (Super Illuminator)
  • Full auto LED light, selectable illumination duration (1.5 seconds or 3 seconds), afterglow
  • Solar powered
  • Low-temperature resistant (–10°C/14°F)
  • 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
  • Altimeter
  • 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)
  • Barometer
  • 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
  • Thermometer
  • 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
  • 31 time zones (48 cities + coordinated universal time), daylight saving on/off
  • 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)
  • 5 daily alarms (with 1 snooze alarm)
  • Hourly time signal
  • Battery level indicator
  • Power Saving (display goes blank 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: Hour, minute, second, pm, year, month, date, day
  • Accuracy: ±15 seconds per month
  • Approx. battery operating time:
  • 8 months on rechargeable battery (operation period with normal use without exposure to light after charge)
  • 23 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)
  • Size of case: 56 × 47 × 12.6 mm
  • Total weight: 57 g
  • LED:White

Recent News about PRG-300 

All Casio PRG-300 News →


You ask, we answer…

What does Tough Solar in PRG-300 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-300?

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

How does Digital compass in PRG-300 work?

It measures and displays direction as one of 16 points.

What does Barometer in PRG-300 do?

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

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