Fangrui Product Details 1. R11 Size 9 Smart Ring, Support Heart Rate Blood Oxygen Sleep Multiple Sports Modes 2. About Product 3. Chipset: Realtek 4. Bluetooth: 5.2 5. Sensor Chip: St Lis2doc 6. Battery Capacity: 15mah 7. Battery Life: 5-7 Days Of Use And 15 Days Of Standby 8. Charging Time: About 1.5h 9. Waterproof: 5atm 10. Size 9: Dia 19.1mm; Circumference 60mm 11. Charging Method: Wireless Charging 12. Compatible System: Android5.1 Or Above, Ios8.0 Or Above 13. App: Qring 14. App Support Language:danish, Ukrainian, Russian, Croatian, Hungarian, Hindi, Indonesian, Türkiye, Hebrew, Greek, German, Italian, Latvian, Czech, Slovak, Slovenian, Japanese, French, Polish, Thai, Estonian, Swedish, Lithuanian, Simplified Chinese, Traditional Chinese, Romanian, English Dutch, Portuguese, Spanish, Vietnamese, Arabic, Korean, Malay 15. Function: 16. Step Count, Distance, Calorie Calculation 17. Health Management: Heart Rate Measurement, Blood Oxygen Saturation, Sleep Tracking, Multiple Exercise Modes, Stress, Heart Rate Variability 18. Touch Function: Single Point Switching Display Function 19. Display: Time, Steps, Heart Rate, Battery Level, Likes Count 20. Other Functions: Remote Control For Taking Photos, Searching For Rings, Gesture Control, Gaming, Female Cycle 21. Packing List: 22. Smart Ring X 1 23. Charging Cable X 1 24. User Manual X 1 25. Compatible Retail Box X 1