Are you tired of feeling restricted by your oxygen therapy? Look no further than our revolutionary portable oxygen concentrator with real-time O2 feedback. All-in-one solution for reliable oxygen therapy on the go and real-time oxygen level monitoring.  Wellue combines the reliable oxygen therapy of our portable concentrator with real-time SpO2 monitoring from the O2Ring. The battery-operated portable oxygen concentrator with 5 flow settings provides the peace of mind of oxygen supply, while the wearable O2Ring continuously tracks your oxygen levels all day, giving you the confidence to explore wherever life takes you. By seeing how your blood oxygen level responds to different POC settings, you can adjust them for maximum effectiveness. This can lead to a more comfortable and secure oxygen therapy experience.  A single battery delivers up to 4.5 hours of use at flow setting 1, while double batteries let you extend your outing time up to 9 hours – that's enough time for a full day of errands, a hike in nature, or a visit with friends…