SR1 Smart Ring Waterproof Heart Rate Sleep Monitor Multi-function Finger Ring (with Charging Case) - Blue/No.10 【24/7 Heart Rate Monitoring】High-precision sensors ensure accurate heart rate tracking day and night. 【Blood Oxygen Detection】Records accurate blood oxygen levels,helping you breathe easier and relax. 【Comprehensive Fitness Tracking】Track your steps,calories,heart rate,and more with the app’s sports and exercise modes. 【Comfortable and Lightweight】Designed for a comfortable,all-day wearable experience,without the bulk. 【Health Insights & Professional Analysis】Monitor heart rate,sleep,stress,and exercise for detailed health insights. 【Minimalist & Elegant Design】Stylish and simple,combining both elegance and high-performance technology. 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-compatible 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 Software functions and applications: Compatibility: Supports Android 5.0 and above versions; For Apple iOS 10.0 and above versions Compatible software: Working with Nova Smart Ring APP: JYOUPRO Size: (Thickness: 2.8mm) 6: Inner diameter: 16.5mm 7: Inner diameter: 17.4mm 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 13: Inner diameter: 22.3mm Package included: 1 x Smart Ring 1 x Charging Case 1 x Charging Cable 1 x English User Manual