Feature:1. Smart Ring Fitness Tracker: The smart ring combines elegant design with advanced sensors to track your health data. Get real time insights and take control of your well being.2. Energy Efficient: The smart ring features a stylish and practical design, with energy efficient technology for 7 day continuous monitoring on a single charge. Compatible with for Android and for iOS for easy data viewing.3. Revolutionize Your Active Lifestyle: More than a fitness tracker, the smart ring motivates you to make healthier choices. Personalized advice for fitness enthusiasts, sleep conscious individuals, and stress managers.4. Practical Gift: The smart ring is a stylish accessory that feels comfortable to wear. Make your loved ones feel special and appreciated with this ideal present for weddings, graduations, and housewarmings.5. IP68 Waterproof: Wear the ring freely in daily water related activities like handwashing, showering, and swimming. Sensors continue monitoring your health data in various water scenarios.Specification:Item Type: Smart RingProduct Material: Aluminum Ti Alloy, Stainless SteelRing Battery: 18mAh Lithium Battery (Shipped with Built in Battery)Charging Case Battery: 300mAh Lithium Battery (Shipped with Built in Battery)Ring Battery Life: About 5 DaysRing Charging Time: 60 MinutesWaterproof Rating: IP68APP: for ECTRI.Package List:1 x Smart Ring1 x Charging Case1 x Instruction Manual1 x Charging CableNote:All data are measured manually, and there are certain errors in the measurement results.