SR2 Smart Ring IP67 Waterproof Health Monitoring Finger Ring with Charging Case - Silver+Gold Edge/No.7 ???Lightweight and Comfortable Design??The smart ring offers a comfortable and lightweight wearing experience,making it a superior choice compared to traditional smart wearables ???Comprehensive Health Monitoring??Tracks multiple health parameters,including exercise,heart rate,sleep quality,and stress levels,providing detailed insights and professional analysis to help you stay on top of your health ???Sleep Quality Analysis??Monitors sleep patterns and provides in-depth analysis of deep sleep stages,enabling you to evaluate and improve your sleep habits for better overall well-being ???24/7 Heart Rate Monitoring??Equipped with high-precision sensors,the smart ring continuously tracks heart activity,offering accurate and real-time data to monitor your cardiovascular health ???Advanced Fitness Tracking??Supports various sports modes,including GPS and indoor/outdoor activities. Tracks steps,distance,calories,heart rate,and pace,while providing detailed exercise data and map tracking through the app for improved fitness goals ?Specifications: ?Waterproof: IP67 ?Material: Shell: titanium steel ?Weight: About 2.9g ?Chipset: Germany Dialog DA14531 ?Memory (ROM+RAM): 128kb ROM + 96kb RAM ?Expand memory: 8M ?G-Sensor: SC7A20C ?Bluetooth Version: 5.1 ?MobileAPP-GPS: Support ?Heartrate sensor: HX3602 ?Battery Type: Polymer Battery ?Operating temperature range: 0-50?? ?Battery Capacity: Ring: about 17.5mAh,Charging Case: about 200mAh ?Charging time: 1 Hour ?Theory Standby time: 10-15 days ?Normal using time: 7-8 days ?Charging: magnetic charging ?Compatible system: Supports Android 5.0 and above versions; For Apple iOS 10.0 and above versions ?APP: JYOUPRO ?Size: ?(Thickness: 2.8mm) ? 8: Inner diameter: 18.2mm ? 9: Inner diameter: 19.0mm ? 10: Inner diameter: 19.9mm ? 11: Inner diameter: 20.7mm ? 12: Inner diameter: 21.5mm Package included: ?1 x Smart Ring ?1 x Charging Case ?1 x Charging Cable ?1 x English User Manual