ULTRAHUMAN Ring AIR – Sleep and Fitness Tracker, Smart Ring for Men and Women, No app fee for Standard Features, Up to 6 Days Battery Life

Powerful light. Incredibly slim. Weighs just 2.4 g. 11 times lighter than a typical smartwatch. Only 2.4 mm thick. Discreet design for everyday use. The most comfortable wearable technology in the world. Glides with you through your day and feels lighter than air. It's there when you need it and invisible when you don't. A form factor so discreet that you easily forget you're wearing it, yet it's hard to ignore what it can do. Wake up to your sleep data. The Sleep Index, intelligently designed as your sole measure of sleep health, assesses your total sleep duration, resting heart rate, and recovery, creating a comprehensive picture of your sleep quality. Temperature tracking made easy. Skin temperature is crucial for measuring your body's physiological states and responses to various factors, including exercise, stress, and illness. Listen to your internal clock. The phase reaction curve describes the complex interplay between a stimulus, such as light, food, or movement, and a shift in your circadian rhythm. To a more active version of you. The Movement Index is designed to keep you moving to promote optimal glucose metabolism and increase your energy expenditure outside of exercise. Maximize recovery with key HRV insights. The correlation between HRV and recovery is essential for understanding the body's recovery capabilities and its readiness for a new day. The only nudges you need. Personalized nudges for a healthier you. Receive tailored insights and notifications that help you make better decisions in real-time.