Open Box Wellue O2Ring Continuous Pulse Oximeter - Wearable Bluetooth Finger O2 Monitor with Vibration Alert & Free PC/APP Reports

Accurate, CE-certified sensing: The Wellue O2Ring uses a CE certified smart SOC chip and delivers SpO2 readings within ±2% for reliable monitoring. Designed for continuous overnight tracking, it begins measuring as soon as you put it on and press the button. The built-in rechargeable battery provides up to 16 hours of operation on a full charge. Comfort and fit: Constructed from soft silicone for all-night comfort, the ring fits most adult fingers with a wearing circumference from 2.0 inches to 3.2 inches and weighs only 15 grams. Bluetooth connectivity and reports: Sync data wirelessly to the free mobile app and PC software to view real-time readings, trend graphs, and detailed reports. Export and share unlimited PDF and CSV files. When connected via Bluetooth, data is automatically uploaded to the app. On-device memory and alerts: Internal storage can hold 4 sets of recordings totaling 10 hours. The O2Ring flags abnormal events when SpO2 falls below or heart rate goes below or above your configured thresholds, and includes a vibration reminder to alert you. Automatic operation and rechargeability: The device powers on automatically when worn and runs up to 16 hours after a full charge. NOTE: This device is intended for sports and aviation use only.