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Casio support: RAM amount and chipset in the wsd-f21hr is proprietary information. So are casio charging 200 USD extra for a 1st gen ticwatch pro? Or is there something exciting on the
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Casio Pro Trek WSD-F21 HR Watch Review | aBlogtoWatch
Casio Pro Trek Smart WSD-F21HR review
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The Casio WSD-F21HR has a heart rate monitor, finally - Android Authority
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Casio WSD-F21HR review - Pocket-lint
Review: Casio WSD-F21HR Smartwatch - Gearlimits
Casio WSD-F21HR review - Pocket-lint
CASIO WSD-F21HR - Test 4 Outside
Casio ProTrek Smart WSD-F20AGN — New Fall Colorway
