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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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Amazon.com: Fingertip Pulse Oximeter Bluetooth Blood Oxygen Saturation Monitor and Pulse Rate Monitor for Apple and Android, with OLED Screen 2 X AAA Batteries and Lanyard : Health & Household
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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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