The Oura Ring Gen 4 Size 9 in Ceramic Petal Pink is a brand new activity tracker that provides detailed measurements for heart rate, sleep quality, and various other health metrics. This sleek and stylish device is powered by batteries and has a battery life of up to 7 days. It is compatible with both iOS and Android operating systems and is suitable for indoor and outdoor activities. With features like Bluetooth connectivity, temperature monitoring, and a calorie monitor, the Oura Ring Gen 4 is a comprehensive tool for tracking and improving your overall health and fitness levels.