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Casio Pro Trek Tough Solar Triple Sensor PRG550-1A9 Watch

Protrek, authentic outdoor gear for the serious adventurer, offers an analog/digital Triple-Sensor timepiece with compass, altitude, barometric pressure and temperature measurement capability.

SKU# CASI-000001

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Manufacturer's SKU PRG550-1A9
UPC 079767962616
Weight (lbs) 0.2000
Manufacturer's Warranty One Year Seller Warranty
Brands Casio
Feature / Environment Water Resistant

Protrek, authentic outdoor gear for the serious adventurer, offers an analog/digital Triple-Sensor timepiece with compass, altitude, barometric pressure and temperature measurement capability. This model provides the best of both analog and digital formats by utilizing a unique second hand and LCD window. Depending on the sensor mode entered, the second hand will indicate direction, altitude differential or barometric pressure tendency in an easy-to-read analog format while the LCD window displays the measured data as values.

Tough Solar Power

Digital Compass

  • Measures and Displays Direction as 
  • one of 16 Points
  • Measuring Range: 0 to 359 Degrees
  • Measuring Unit: 1 Degree
  • 20 Seconds Continuous Measurement
  • Hand Indication of North
  • Bidirectional Calibration and Northerly 
  • Calibration Function
  • Magnetic Declination Correction


  • Measuring Range: -700 to 10,000m 
  • (-2,300 to 32,800ft)
  • Measuring Unit: 5m (20ft)
  • Hand Indication of Altitude Differential
  • Altimeter Memory (Manual Measurements)
  • Memory Capacity: 14 Records
  • Measurement Data: Altitude, Date, Time
  • High/Low Altitude Memory
  • Cumulative Ascent/Descent Memory
  • Reference Altitude Setting
  • Altitude Tendency Graph


  • 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


  • Display Range: -10° to 60° C (14° to 140° F)
  • Display Unit: 0.1° C (0.2° F)

World Time

  • 29 Time Zones (29 Cities + UTC), 
  • City Code Display, 
  • Daylight Saving On/Off

1/100 Second Stopwatch

  • Measuring Capacity: 59’59.99”
  • Measuring Modes: Elapsed Time, Split Time, 
  • 1st-2nd Place Times
 Countdown Timer
  • Measuring Unit: 1 Second
  • Countdown Range: 1 Minute to 60 Minutes 
  • (1-minute Increments)

Other Features:

  • 100M Water Resistant
  • Low Temperature Resistant (-10° C / 14° F)
  • Full Auto LED Light with Afterglow
  • Neo-brite Luminous Hands and Markers
  • 5 Daily Alarms
  • Hourly Time Signal 
  • Full Auto-calendar (Pre-programmed until the year 2099)
  • 12/24 Hour Formats
  • Button Operation Tone On/Off
  • Accuracy: +/-15 Seconds per month
  • Battery Power Indicator
  • Power Saving Function
  • Storage Battery: Solar Rechargeable Battery
  • Approximate Battery Life: 6 Months on full charge (without further exposure to light)
  • Size of Case/Total Weight……….56.8 x 49.3 x 14.2mm / 79.6g

Customer Reviews

Casio ProTrek Review by Casey

Great ABC watch! It's durable, easy to read and charges using solar...you can't beat it. It's a lot more practical than a USB charge watch, also all the controls are very user friendly and super easy to figure out. Great watch for hiking, watersports, climbing...it will take whatever you throw at it. A quality product from a company that's been around for a long time and knows their electronics.

(Posted on 5/30/2013)

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