[Choose Size & Charge the Ring Before Buy & Using It] Before purchasing our FONADA smart ring, we strongly recommend that you refer to the size chart and carefully measure the circumference of your finger. This will ensure you get the most comfortable wearing experience and easily avoid any unnecessary returns. And please fully charge when you receive the smart ring, so that it can work normally. When wearing it, keep the optical sensor in close contact with the skin of your fingertips to ensure accurate data. Also, remove the smart ring before touching slippery objects on your hand to prevent it from falling off.[Comprehensive health insights and activity analysis] This advanced smart ring has built-in optical sensors that automatically monitor heart rate, blood oxygen levels, blood pressure, and sleep analysis. It uses the SC7A20H accelerometer to track steps, calories burned, and distance. It is suitable for analyzing activities such as running, cycling, and yoga, and can be used as a dedicated fitness ring and health tracking ring. [Extended Battery Performance & Durable Design] Engineered for longevity, the smart ring offers approximately 2-4 days of regular use and up to 7-10 days in standby mode. The IP68 rating helps protect against sweat and water immersion during hand washing. [IP68 Waterproof and Dustproof] This smart ring is waterproof and suitable for daily washing, showering, light swimming, sweating during exercise, outdoor activities in the rain, and cooking. However, avoid wearing it in hot environments like hot tubs and spas, or during high-speed water activities like diving, to avoid corrosion on the ring's charging contacts. [Ergonomic Design & Fashion Forward] This health ring features a comfortable resin + stainless steel case and comes in a variety of sizes. It is designed for secure, comfortable all-day wear, making it a stylish smart ring for everyone. [Remote Shooting and Friends Function] This app supports remote photo control, allowing you to easily capture beautiful moments. It also includes a health data sharing mode that allows you to share health data with others, making it an ideal gift choice for friends, couples, and family members. [Health Gift for Your Loved Ones] More than just a wearable smart ring, it not only monitors your health but also serves as a constant reminder to keep an eye on the health of your family and friends. Whether it's a birthday, Valentine's Day, Mother's Day, Father's Day, Thanksgiving, Christmas, or New Year's, this is the perfect gift for family or friends. [What's In The Box] Smart Ring*1,Charging Case*1,Charging Cable*1,Storage Pouch*1,Cleaning Pad*3,User Manual*1.We are committed to providing a high-quality wearable device experience without any app subscription fees.13#,12#,11#,10#,9#,8#,7#,14#