R12 SIZE 7 Smart Ring, Support Heart Rate Blood Oxygen Sleep Monitoring Female Health About Product: 1. Chipset:Realtek 2. FLASH memory:RAM104KB FLASH 512KB 3. Sensor:ST LIS2DOCTR 4. Heart rate sensor: Vcare VC30F-S 5. Battery Capacity: 14mAh(18mAh for size 11 and above) 6. StandbyBattery life:5-7 days of use and 15 days of standby 7. Charging time: About 1.5H 8. Waterproof: 5ATM 9. Size 7: Diameter 17.4mm; Perimeter 55mm 10. Charging method: Magnetic charging 11. Compatible system: Android5.1 or above, iOS9.0 or above 12. APP:QRing 13. APP supported languages: Danish, Ukrainian, Russian, Croatian, Hungarian, Hindi, Indonesian, Trkiye, 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 Functions: 1. Step count, Calories, Distance 2. Heart Rate, Blood Oxygen, Sleep Monitor, Multiple Sports Modes, Stress Monitoring, HRVHeart Rate Variability 3. Remote Camera Control, Find My Ring, Gesture Control, Games, Female Health 4. Unit format, 24-hour switching, low battery prompt Packing list: Smart ring x 1 Charging case x 1 User manual x 1 COMPATIBLE retail case x 1