Google Pixel Watch gains support for SpO2 (blood oxygen saturation) tracking
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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Health Tracker Smart Watch 1.3in HD 2.5D Curved LED Screen - Heart Rate, Blood Pressure, SPO2 Blood Oxygen, 7 Sport Mode, Steps Distance Calorie, Sleep Monitor, Weather, Message, Music & Photo Control -