1、Sleep Monitoring: The smart ring health tracker scores the quality of sleep based on the ratio of rapid eye movement sleep, lighting sleep and deep sleep throughout the sleep cycle and gives appropriate recommendations. Get a clearer picture of the factors affecting your health and athletic ability. 2、50m Water Resistant: With a water resistant rating of 50m, this smart health ring is water resistant, sweatproof, and dust resistant, providing reliable performance during swimming, showering, and other water related activities. 3、Fitness Ring: Achieve your fitness goals with this fitness ring. It accurately records the distance you've run, calories burned, and time spent active, so you'll know your progress throughout the day. 4、Comfortable to Wear: The ring is designed to be lightweight and comfortable, taking up minimal hand space, making it suitable for all day wear without discomfort. Rugged, lightweight and comfortable to wear, this smart ring ensures long lasting performance. 5、Multiple Exercise Modes: The smart ring supports regular exercise multiple and map track exercise, including walking, running, cycling, etc. After exercise, you can view Application exercise data, such as exercise time, exercise distance, calories burned and so on. 6、Good Endurance Performance: We use low power consumption control chip and 20mAh capacity polymer lithium battery, in depth power management and low power mode selection, which greatly improves the ring's endurance performance. The battery life is 7‑10 days of normal use. Item Type: Smart Ring Material: Stainless steel Battery Capacity: 20mAh (Shipped with built in battery) Water resistant Level: 50m Application Support: For Android 6.0 and above, for IOS 11.0 and above, BT5.1 support Ring Thickness: 3mm Charging Method: Magnetic suction charging 1 x Smart Ring 1 x USB Cable 1 x User Manual