Gen 3 Oura Ring, size 10. Charger and cable included. No box. Works great, was recently gifted the gen 4 The Oura Ring in size 10, Gen 3 is an advanced activity tracker designed for both indoor and outdoor use. Made of metal, it features a 240 x 240 display resolution and provides heart rate measurements in both decimal and imperial systems. With a battery life of up to 7 days, this unisex ring is equipped with an accelerometer sensor for accurate tracking. Additionally, it offers sleep tracking features and is compatible with both iOS and Android operating systems. Whether you're a beginner or a seasoned athlete, the Oura Ring is a reliable tool for monitoring your fitness progress and helping you achieve your goals.