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Casio Pro Trek Smart WSD-F30 smartwatch has a smaller case, better power management, and improved dual-layer display
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Casio unveils Pro Trek WSD-F30, a rugged smartwatch that lasts up to 30 days on a charge | VentureBeat
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Casio's WSD-F30 is a longer-lasting and (slightly) slimmer rugged smartwatch - NotebookCheck.net News
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