The Oura Ring 4 Smart Bluetooth in Silver, size 10, is a high-quality activity tracker made from titanium with a display resolution of 240 x 240. It provides accurate heart rate measurements and has a battery life of up to 7 days. This stylish unisex ring is designed for indoor and outdoor use, with features such as Bluetooth connectivity and sleep tracking. Compatible with Android operating systems, it also includes an accelerometer sensor specifically for running and jogging activities. With a manufacturer warranty of 2 years, this advanced fitness tech device is a must-have for anyone looking to track their health and performance.
eBay