The Oura Ring Gen 2 Silver Tone Heritage Black Size 9 is a sleek and advanced fitness tracker designed for both indoor and outdoor activities. Made of durable titanium material, this activity tracker provides accurate measurements of heart rate and sleep patterns. With a display resolution of 240 x 240, it offers a clear view of your fitness data. The Oura Ring Gen 2 is equipped with features such as water resistance, GPS, and an infrared sensor, making it ideal for running and jogging. Compatible with both iOS and Android operating systems, this activity tracker has a battery life of up to 7 days and comes with a 1-year manufacturer warranty.