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Casio Pro Trek Smart WSD-F30 smartwatch has a smaller case, better power management, and improved dual-layer display
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Casio WSD-F30-RG Pro Trek 4GB GPS Bluetooth Smartwatch for Men - Black/Orange for sale online | eBay
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CASIO PRO TREK SMART OUTDOOR WATCH WSD-F20-RGBAE: retail price, second hand price, specifications and reviews - AskMe.Watch
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