Oura Gen3 Horizon Gold US9 Set Used and condition as pictured - works perfectly, comes with charger THE REVOLUTIONARY SMART RING - Track your sleep, activity, stress, heart rate and more 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