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 - What is your favorite feature on the PRT-B50? Comment below! Feel the Field #casio #protrek #feelthefield #beauty #trekking #nature #hiking #travel #mountains #adventure #mountain #landscape #naturelovers #watch