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The PRT-B50YT-1 is equipped with a smartphone link function and quad sensor for measuring step count, direction, altitude/barometric pressure, and temperature.
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Casio ProTrek PRT-B50YT-1JF
Casio Pro Trek PRT-B50-1ER
PRT-B50-1
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Watch Review: Casio Pro Trek PRT-B50 Black Titanium
Casio PRO TREK PRTB50YT-1 Quad Sensor Bluetooth Connected Watch review - The Gadgeteer
Casio Pro Trek PRTB50-1: Your Wrist-Bound Adventure Guide
Casio PRO TREK PRTB50YT-1 Quad Sensor Bluetooth Connected Watch review - The Gadgeteer
PRT-B50
Watch Review: Casio Pro Trek PRT-B50 Black Titanium