LOOKEE O2-Ring Sleep Oxygen Monitor Tracker | Vibrating Indicator for Low O2 | Tracks Oxygen Level and Heart Rate | Free APP for Sleep Insights | Sports or Aviation Use Only LOOKEE Sale! from 19579 0 /per Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Accurately and continuously tracks and records your blood oxygen levels, heart rate and body movement. Built-in smart vibration feedback when it detects the blood oxygen level 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. Free Mobile APP allows you to get into the insight of your sleep. You Will Get: 12 month Worry-Free Warranty, Lifetime Lookee Tech Support, First Class Customer Service.