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Casio Pro Trek Smart WSD-F30 smartwatch has a smaller case, better power management, and improved dual-layer display - G-Central G-Shock Fan Site
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Amazon.com: 200Pcs Compatible for WSD-F20 Screen Protector, 9H Tempered Glass Screen Protector Compatible for CASIO Smart Watch WSD-F20 Protrek Smart/WSD-F30 Smartwatch (3 ) : Everything Else
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Casio Pro Trek Smart WSD-F30 smartwatch has a smaller case, better power management, and improved dual-layer display - G-Central G-Shock Fan Site
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