The Oura Ring Gen 4 Ceramic Cloud/White Size 10 is a unisex activity tracker designed for indoor and outdoor use. With a display resolution of 240 x 240 and a battery life of up to 7 days, this ring provides heart rate measurements and sleep tracking features. It is compatible with Android operating system. This advanced fitness tracker is ideal for those interested in running and jogging, offering both style and functionality in a sleek white design.