The Oura Ring Gen 4 in Silver is a brand new, factory-sealed activity tracker designed for unisex adults interested in monitoring their fitness and health. With features like heart rate monitoring, sleep tracking, and water resistance, this ring provides accurate data on your daily activities and helps you track progress towards your fitness goals. Powered by batteries with a battery life of up to 7 days, it offers both indoor and outdoor use and is compatible with iOS and Android operating systems. Made of titanium and featuring a 2.4x external display, this ring is not only stylish but also packed with advanced technology to enhance your fitness experience.