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Lawsuit alleges Apple Watch's blood oxygen sensor 'racially biased'; accuracy problems reported industry-wide - ABC News
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Apple Watch teardown reveals pulse oximeter, suggesting future measurement of blood oxygen - 9to5Mac
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Bluetooth Fingertip Pulse Oximeter Oximetry Blood Oxygen Saturation Monitor and Pulse Rate Monitor for Apple and Android, Includes Lanyard and 2*AAA Battery : Amazon.sg: Sporting Goods
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Researchers find the blood oxygen sensor on Apple Watch to be as reliable as a medical grade device | Technology & Science News, Times Now
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HealthTree Bluetooth Pulse Oximeter Fingertip, Blood Oxygen Saturation Monitor and Heart Rate Monitor with Free APP, for Apple and Android, 2 X AAA Batteries, Lanyard gray
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