LIKE NEW. NO DAMAGE OR WEAR. The Oura Ring 4 Smart Ring 4th Gen. in size 7 and silver color is a unisex activity tracker designed for running and jogging. It features advanced tracking capabilities such as temperature monitoring, heart rate monitoring, and sleep tracking. The ring is from the brand Oura and is made in Mexico. With its decimal and imperial measurement system, the Oura Ring 4 is an innovative tool for fitness enthusiasts looking to track their performance and health metrics in real-time.