Size Tips: Please refer to the size chart and measure your finger circumference before purchasing a smart ring to ensure a comfortable fit and reduce returns. Health Monitoring & IP68 Waterproof: Equipped with advanced 4.0 sensors, this slim smart ring automatically tracks heart rate, blood oxygen, and blood pressure every 30 minutes. IP68 waterproof design allows daily washing, showers, and shallow swimming without removal.It provides continuous health tracking and comprehensive wellness management throughout the day. 8 Sports Modes Tracking: Supports Running, Cycling, Jump Rope, Walking, Hiking, Yoga, Dancing, and Golf. The smart ring automatically tracks route, duration, steps, heart rate, speed, calories burned, and distance via the app. Sleep Tracking: Monitors sleep quality, including deep/light sleep, eye movement, and wakefulness. View detailed reports in the app to improve your lifestyle. Long Battery & Wide Compatibility: This smart ring comes with a charging case offers 3-5 days of use after 1-2 hours of charging. Compatible with Android 5.0+ and iOS 9.0+ Package Contents:Includes lifetime warranty and lifetime customer service, 1x Smart Ring, 1x USB flash drive (gift for valued customers; not part of accessories), 1x Charging Case, 1x Charging Case lanyard, 1x Type-C cable for case charging, 1x Ring charging cable for direct ring charging, and 1x User manual. metabolism tracker device heart rate ring best sleep tracking device vital health ring for women activity & fitness trackers fitness tracker ring sleep tracker ring sleep ring health rings for men ring health tracker smart ring for men ring fitness tracker fitness ring health ring health tracker ring