• Continuous monitoring: O2Ring can continuously monitor blood oxygen saturation and heart rate, generating detailed trend reports in the APP or PC software. Reports can be shared in PDF/CSV format. • Smart notification: O2Ring will notify you via finger vibration or a beep on the phone (when connected) if it detects abnormal oxygen saturation or heart rate. You can adjust the threshold in the APP. • Ease of use and portability: The patented soft silicone ring sensor ensures accurate measurements and never slips off the finger. You can check your health status anytime and anywhere. It is the lightest and smallest oxygen monitor. • Intelligent data management: The built-in memory allows it to work independently without a phone. Data is automatically synchronized with the APP when connected to the phone and can also be synchronized with the PC via the supplied cable. Unlimited storage at no additional cost. • Note: The exact reading will be displayed 10 seconds after you stop exercising and calm down. It will show "--" if your finger moves too much.