R11 SIZE 13 Smart Ring, Support Heart Rate Blood Oxygen Sleep Multiple Sports Modes About Product 1. Chipset: Realtek 2. Bluetooth: 5.2 3. Sensor chip: ST LIS2DOC 4. Battery Capacity: 15mAh 5. Battery life: 5-7 days of use and 15 days of standby 6. Charging time: About 1.5H 7. Waterproof: 5ATM 8. Size 13: Dia 22.3mm; Circumference 70mm 9. Charging method: Wireless 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, 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 Function: 1. Step count, distance, calorie calculation 2. Health management: heart rate measurement, blood oxygen saturation, sleep tracking, multiple exercise modes, stress, heart rate variability 3. Touch function: single point switching display function 4. Display: time, steps, heart rate, battery level, likes count 5. Other functions: remote control for taking photos, searching for rings, gesture control, gaming, female cycle Packing list: Smart ring x 1 Charging cable x 1 User manual x 1 COMPATIBLE retail box x 1