Note: Please measure your finger circumference before purchasing, and then choose the appropriate size. ★【Smart Ring: Minimalist Elegance, Cutting-Edge Performance】 The smart ring goes beyond traditional wearables with its minimalist, transparent resin inner diameter design. The smart ring uses cutting-edge technology to achieve precise data monitoring and intelligent manufacturing. Stylish, simple, and generous, both appearance and hardware perform exceptionally well. ★【Smart Ring: 24/7 Heart Health Monitoring 】As a professional heart health consultant, the Smart Ring, equipped with a high-precision and high-performance heart rate sensor, accurately obtains data and monitors your heart activity 24/7. The Smart Ring intelligently analyzes the relationship between your activity and heart rate, while the app sends you reminders when your heart rate is too high. ★【Smart Ring: Comprehensive Sleep Analysis 】By analyzing sleep efficiency, latency, timing, stages, movements, heart rate variability, and blood oxygen, our sleep analysis provides a comprehensive understanding of sleep behaviors and physical states ★【Smart Ring: Elevate Your Fitness 】Experience diverse sports activities on the Smart Ring app, covering GPS, indoor, and outdoor. Wear the Smart Ring to effortlessly track steps, distance, calories, heart rate, and pace. Analyze map path tracking and detailed exercise data to enhance your performance and push beyond your limits. ★【Smart Ring: All-day monitoring 】Employing patented energy-saving tech, the Smart ring ensures 4-6 days of continuous monitoring without recharging. ★【Smart Ring: Free Health Tracking App 】The smart ring health tracker data can be viewed for free on a mobile app without any subscription fees. The device supports Android 5.0 and iOS 10.0 and above. ★Waterproof and sweatproof, rated IPX7, ensuring durability. Product Parameters: CPU:FR8016HA. Bluetooth Version:BLE 5.0. Battery capacity:28mAh. Stanby Time:About 45days. Working Time:About 3-5days. Charing time:0.5H. G Sensor:msa310. Heart Rate Sensor:HX3605. Magnet Cable(With SMT Protect IC). Waterproof Level:IP67. Charging Requirement:Charging 1A or less. APP：JYouPro. system requirements:android5.0+ / ios10.0+. Main Function: Heart rate measurement. Oximetry. Blood pressure measurement. Sleep monitoring. Step Count. Calories. Packing list: smart ring*1, charging case*1, manual*1 Your 5 star review is the best support to our store!