Brand New Oura Smart Ring Heritage Silver Generation 3 Size 7. Fitness Tracker - 5-7 Days Battery Life Key Specs Operating System Compatibility Apple iOS, Android Metrics Measured Blood oxygen, Hours slept, Resting heart rate, Skin temperature, Steps taken Protective Qualities Water resistant Maximum Depth of Water Resistance 328 feet THE REVOLUTIONARY SMART RING - Track your sleep, activity, stress, heart rate and more with the Oura Membership. MORE ACCURATE BY DESIGN - Your finger provides the most accurate pulse reading, making your health data and insights more personal than ever. Oura Ring’s research grade sensors monitor over 20 biometrics with precision. SYNC WITH YOUR FAVORITE APPS - Compatible with iOS and Android — Oura seamlessly integrates with over 40 apps including Apple Health, Google Health Connect, Natural Cycles, Flo, Strava, & more. HSA/FSA ELIGIBLE - We can accept HSA or FSA funds for the following: Oura Ring, additional chargers, and shipping. EASY TO WEAR, EVERYWHERE - Every Oura Ring is made of titanium: built to last, lighter than the average wedding band, non-allergenic, and water resistant. From a workout to a night out, Oura discreetly monitors your health with comfort and accuracy. LOOKING FOR THE BEST HEALTH TRACKER? - Whether you’re searching for a sleep ring or fitness ring, Oura Ring is for you— this revolutionary smart ring that allows you to discreetly track your sleep, activity, recovery and stress - in style