Where to Buy

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Retailers' Descriptions

Here's what other sites are saying:

The solar-powered, triple-sensor Casio ProTrek PRG550-1A1CR multifunction watch sports easy-to-use features, including a digital compass, altimeter, barometer and thermometer.

- REI

Don't be fooled by the classic analog look of the Casio Pro Trek PRG550-1A1 Altimeter Watch; behind that pretty face lurks an altimeter, compass, barometer, thermometer, and full-featured watch. As rugged as it is feature-packed, this new member of the Triple Sensor family runs on Tough Solar Power technology that recharges every time you take it out into the light.

- Backcountry.com