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Casio ProTrek PRT-B50-1CR Quad Sensor Watch and ProTrek Connected App + Route log Detailed Review - YouTube
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The CASIO PRT-B50 is the first PRO TREK analog watch to have Smartphone Link and 4 environmental sensors - NotebookCheck.net News
CASIO PRO TREK - The PRT-B50 is waterproof enabling you to trek in wet environments. Designed to be worn in nature, the PRT-B50 is the perfect piece of equipment to take with
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