Price: $17.99 Runs automatically when you wear it, accurately and continuously tracks and records your blood oxygen levels, heart rate and body movement. Free APP and PC Software allow you to download, review,save as PDF/JPG, print and share your reports easily with no extra cost. Built-in smart vibration feedback when it detects the blood oxygen level or heart rate out of threshold you preset on the App. Patented finger ring sensor totally free your finger while ensuring accurate measurements. Lightest, smallest, most comfortable for continuous tracking. You Will Get: 12 month Worry-Free Warranty, Lifetime technical support, Top grade customer service of fast response within 12h.