Features 1、Health Monitoring: Smart health ring leverages advanced technology, functioning as a real time health data monitor. It helps you clearly understand the factors that influence your health and physical capacity, allowing you to make informed decisions about your lifestyle. 2、Sleep Tracking: Make the most of your nights with the smart ring health tracker, which scores your sleep quality based on the proportion of rapid eye movement sleep, light sleep, and deep sleep in your entire sleep cycle. It also offers tailored advice to help improve your overall sleep health. 3、IP68 Waterproof: With an IP68 waterproof rating, this smart health ring provides reliable performance in various water related activities such as swimming and showering. It is not just waterproof, but also sweatproof and dustproof, making it perfect for wear in all conditions. 4、Fitness Companion: Reach your fitness goals in style with this fitness ring. It records the distance you have run, the calories you have burnt, and your active time accurately, offering a comprehensive view of your daily progress. 5、Durable and Comfortable: This ring boasts an exceptional design made of a blend of aluminum alloy and stainless steel that is durable and lightweight for comfortable wear. Its compact design takes minimal space on your finger, enabling comfortable all day wear. Its battery life lasts for 7‑10 days under normal usage, ensuring dependable performance. Specification Item Type: Smart Ring Material: Stainless steel Battery Type: Lithium ion Battery Battery Capacity: 17.5mAh (with built in battery) Waterproof Level: IP68 Supporting System: for Android 5.0, for iOS 10.0 and above Ring Thickness: Approx. 2.8mm / 0.1in Charging Method: Magnetic Charging Working Temperature: 0-50°C Storage Capacity: 128kb ROM + 96kb RAM Package List 1 x Smart Ring 1 x USB Cable 1 x User Manual