SR1 Smart Ring Multi-function Heart Rate Sleep Monitor Waterproof Finger Ring (No Charging Case) - Blue/No.8 Comfortable and lightweight wearing experience sets it apart from other smart wearable products In multiple health modules such as exercise,heart rate,sleep,exercise,and stress. It can provide detailed insights and professional analysis to monitor your health The minimalist appearance surpasses the complexity of traditional wearable products. Combining fashion simplicity with elegance,both inside and outside,it is the pinnacle of both aesthetics and hardware strength The intelligent ring is equipped with the most efficient hardware to provide accurate information monitoring data 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: About 17.5mAh 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 Cable 1 x English User Manual