Casio's Pro Trek line of smart watches started in 2016 with the WSD-F10, a bulky, expensive Android Wear device with aesthetics and a feature set slanted at the outdoorsy market. The company followed up in 2017 with the WSD-F20, a refinement on the concept. Now, Casio is back at it with the WSD-F30, which is less chunky, but still rugged (and expensive).

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