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Casio "Pro Trek" Outdoor Heart-Rate Monitor GPS Sports Watch (Model WSD-F21HR-BKAGU) (BLACK) - Walmart.com
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Casio Announces New PRO TREK Smart Model with Heart Rate Monitor for Outdoor Enthusiasts - Fareastgizmos
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Casio "Pro Trek" Outdoor Heart-Rate Monitor GPS Sports Watch (Model WSD-F21HR-BKAGU) (BLACK) - Walmart.com
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Casio's new Wear OS smartwatch is also its first to have a heart-rate monitor - NotebookCheck.net News
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