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Pulse Oximeter vs SpO2 monitor in Smartwatches: Blood Oxygen Track Reliability, Which One Should You Buy in COVID-19 times, Should you rely on smartwatches to measure blood oxygen,
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SUUNTO 9 Peak 43mm Robust Activity/Sports Watch with GPS/HR and Long Battery Life Moss Grey SS050524000 - Best Buy
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Suunto 9 Peak Pro: Sports watch with built-in GPS, SpO2 sensor and dive mode for $549 | gagadget.com
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