View 4 of (FUNCTIONAL/USED) Wellue O2 Pulse Oximeter with Smart Reminder | Blood Oxygen Saturation Monitor for SpO2 and Heart Rate Tracking Continuously, Bluetooth Finger Ring with Free APP &PC Report

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View 1 of (FUNCTIONAL/USED) Wellue O2 Pulse Oximeter with Smart Reminder | Blood Oxygen Saturation Monitor for SpO2 and Heart Rate Tracking Continuously, Bluetooth Finger Ring with Free APP &PC ReportView 2 of (FUNCTIONAL/USED) Wellue O2 Pulse Oximeter with Smart Reminder | Blood Oxygen Saturation Monitor for SpO2 and Heart Rate Tracking Continuously, Bluetooth Finger Ring with Free APP &PC ReportView 3 of (FUNCTIONAL/USED) Wellue O2 Pulse Oximeter with Smart Reminder | Blood Oxygen Saturation Monitor for SpO2 and Heart Rate Tracking Continuously, Bluetooth Finger Ring with Free APP &PC ReportView 4 of (FUNCTIONAL/USED) Wellue O2 Pulse Oximeter with Smart Reminder | Blood Oxygen Saturation Monitor for SpO2 and Heart Rate Tracking Continuously, Bluetooth Finger Ring with Free APP &PC Report