Brand new sealed box, never opened. The Oura Ring 4 Smart Ring Activity Tracker in size 8 and black color is a titanium ring designed for unisex adults. This innovative device provides a variety of measurements including sleep duration, heart rate, stress level, blood oxygen level, and more. With a battery life of 8 days and water-resistant features, this Bluetooth-enabled smart ring is perfect for tracking activities such as walking, cycling, running, and yoga, among others. Its lightweight design and lack of wired connection ports make it convenient and versatile for daily use.
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