The OxyWatch. A Walgreens Pulse Fingertip Oximeter C20 - YouTube
Portable, consumer‐grade pulse oximeters are accurate for home and medical use: Implications for use in the COVID‐19 pandemic and other resource‐limited environments - Schrading - 2020 - Journal of the American College
Walgreens Pulse Oximeter with Respiratory Rate | Walgreens
The 2 Best Pulse Oximeters for Home Use of 2024 | Reviews by Wirecutter
The 2 Best Pulse Oximeters for Home Use of 2024 | Reviews by Wirecutter