The Oura Ring Gen 4 in Black, Size 5 is a stylish and advanced activity tracker designed for both indoor and outdoor use. Made from titanium, this ring offers provides measurements for time, heart rate, and sleep quality. As pre-owned the battery has slight reduced capacity and measures but remains very useable. It is compatible with both iOS and Android operating systems, boasts a black colour, and is water-resistant. With its sleek design and innovative features, such as an accelerometer sensor, the Oura Ring Gen 4 is the perfect device for running and jogging enthusiasts looking to track their performance and health.
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