R06 SIZE 8 Smart Ring, Support Heart Rate Blood Oxygen Sleep Monitoring Multiple Sports Modes About Product 1. Main Chip: RF03 2. Bluetooth: 5.0 3. Sensor chip: STK8321 4. Battery Capacity: 15mAh 5. Battery life: 5-7 days of use and 15 days of standby 6. Charging time: About 1H 7. Waterproof: 5ATM 8. Size 8: Dia 18.3mm; Circumference 57.5mm 9. Charging method: Magnetic charging 10. Compatible system: Android5.1 or above, iOS8.0 or above 11. APP: QRing 12. APP support language: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 Packing list: Smart ring x 1 Charging cable x 1 User manual x 1 Original retail box x 1