The Oura Ring Gen 4 Gold Size 9 is a new activity tracker that measures heart rate, calories, and distance, both indoors and outdoors. It has a battery life of up to 7 days and is water-resistant. The ring is made of titanium and features Bluetooth connectivity, temperature sensing, an altimeter, pedometer, data review, heart rate monitoring, and sleep tracking. It is compatible with iOS and Android operating systems and comes with a 1-year manufacturer warranty. The sleek gold design, high-quality materials, and advanced features make it a top choice for fitness enthusiasts looking to track their activities accurately and efficiently.