Ultrahuman Ring AIR [Size 12] (Matte Grey) TemporarilyUnavailable Using your VO2 max—how well

Using your VO2 max—how well your body uses oxygen during exercise—Fitbit gives you a personalised score that helps you understand how fit you are

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Ultrahuman Ring AIR [Size 12] (Matte Grey) TemporarilyUnavailable Using your VO2 max—how wellAccurately measures your sleep, HRV, movement, and temperature, with insights to help you improve your health every day. Key Features Minimalist design The Ultrahuman Air Ring is incredibly lightweight and comfortable, making it barely noticeable when worn. Advanced sleep tracking Equipped with powerful sleep algorithms, it provides detailed insights into your sleep patterns and quality. No subscription fees Unlike many other fitness trackers, the