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This app claims to let users monitor SpO2 levels and pulse rate with your smartphone: Here's how it works | Tech News
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Electronics | Free Full-Text | Development of a Low-Cost Pulse Oximeter for Taking Medical-Scientific Parameters to Monitor Remote Patients
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Portable PC Based SpO2 Sensor Pulse Oximeter Oximetry Reusable Adult Ear Clip with Adapter to Andorid Mobile To Test SAO2 PR PI - AliExpress
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Amazon.com: HIHBI AOJ-70B Pulse oximeter, blood oxygen meter finger (SpO2) with Plethysmograph and Perfusion Index, portable OLED color display and battery included. : Health & Household
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MightySat® Fingertip Pulse Oximeter - Track your health using the same technology hospitals rely on | Personal Health - US
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