ProTrek PRTB50 Altimeter | Combine the PRT-B50's time and altimeter reading to monitor your progress through the climb. http://bit.ly/ProTrekPRTB50-1 | By Casio PRO TREK | Facebook
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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
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