Photo 1 of Wellue O2Ring-S Oxygen Monitor for Small Fingers | Rechargeable Pulse Oximeter, Continuous Blood Oxygen & Pulse Rate Tracking with Vibration Reminder | 24 hrs Battery Life, 4 * 10 Hours Data Storage

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Photo 1 of Wellue O2Ring-S Oxygen Monitor for Small Fingers | Rechargeable Pulse Oximeter, Continuous Blood Oxygen & Pulse Rate Tracking with Vibration Reminder | 24 hrs Battery Life, 4 * 10 Hours Data StoragePhoto 2 of Wellue O2Ring-S Oxygen Monitor for Small Fingers | Rechargeable Pulse Oximeter, Continuous Blood Oxygen & Pulse Rate Tracking with Vibration Reminder | 24 hrs Battery Life, 4 * 10 Hours Data StoragePhoto 3 of Wellue O2Ring-S Oxygen Monitor for Small Fingers | Rechargeable Pulse Oximeter, Continuous Blood Oxygen & Pulse Rate Tracking with Vibration Reminder | 24 hrs Battery Life, 4 * 10 Hours Data StoragePhoto 4 of Wellue O2Ring-S Oxygen Monitor for Small Fingers | Rechargeable Pulse Oximeter, Continuous Blood Oxygen & Pulse Rate Tracking with Vibration Reminder | 24 hrs Battery Life, 4 * 10 Hours Data StoragePhoto 5 of Wellue O2Ring-S Oxygen Monitor for Small Fingers | Rechargeable Pulse Oximeter, Continuous Blood Oxygen & Pulse Rate Tracking with Vibration Reminder | 24 hrs Battery Life, 4 * 10 Hours Data Storage