- SIZING GUIDE: Revo rings have a unique sizing system. Please consult the size chart before making your purchase to ensure the perfect fit. - ACCURATE SLEEP MONITORING: This Smart Ring accurately tracks your sleep duration and quality, providing insights into deep sleep, light sleep, and wake times. Access detailed sleep data through the user-friendly mobile app. - COMPREHENSIVE FITNESS TRACKING: Record your daily physical activity with this fitness tracker ring. It automatically monitors your heart rate and heart rate variability, with options for manual tracking via the "Smart Health" app. Conduct oximetry and stress assessments through the app for a complete health overview. - IP68 WATER RESISTANT: Enjoy versatility with an IP68 waterproof rating. This smart ring can be worn in the shower, during rainy workouts, or while swimming, withstanding depths of up to 164 feet. - NO HIDDEN FEES: View all your Smart Ring Health Tracker data through the mobile app with no subscription fees. Compatible with Android 6.0 and iOS 11.0 or higher, it's a one-time investment for a lifetime of insights. Use Case Scenarios: 1. Monitor your sleep patterns to make informed adjustments for better rest. 2. Track your workout performance and heart health seamlessly on a daily basis. 3. Maintain your ring's functionality during various activities, from swimming to intense workouts, without the need for extra care. Stay in tune with your health effortlessly and efficiently.