1. SIZING MADE SIMPLE - Revo ring sizes differ from standard sizes. Please refer to our size chart before making a purchase. If you encounter any sizing issues, we will gladly assist you. 2. ACCURATE SLEEP MONITORING - Track your sleep patterns with precision. The Smart Ring measures total sleep time, deep and light sleep phases, and wakefulness during the night. Access detailed sleep data through the mobile app. 3. COMPREHENSIVE FITNESS TRACKER - Monitor your daily activity with ease. This ring automatically tracks your exercise, heart rate, and heart rate variability. Manually check oximetry and stress levels via the Smart Health app for a complete health overview. 4. PREMIUM CERAMIC DESIGN - Crafted from lightweight, skin-friendly microcrystalline zirconium nano-ceramics, this smart ring offers durability and elegance without fading. Its comfortable fit makes it perfect for everyday wear. 5. IP68 WATER RESISTANCE - Designed for an active lifestyle, this smart ring is IP68 waterproof. Wear it while showering, exercising in the rain, or swimming, with protection up to 164 feet. 6. NO HIDDEN FEES - Enjoy lifetime access to your health data through the mobile app without any subscription costs. Compatible with Android 6.0 and iOS 11.0 and above for user-friendly experience. Use Scenarios: - Monitor your sleep quality every night to improve overall health and well-being. - Track your workouts and heart rate during exercises to stay on top of your fitness goals. - Wear your ring while swimming or showering without worrying about water damage, ensuring continuous health tracking.