HR01 SIZE 11 Smart Ring, Support Heart Rate Blood Oxygen Sleep Monitoring Female Menstrual Cycle About Product: 1. System requirements: Android 8.0 and higher versions, IOS12.0 and higher versions 2. Master chip: AB2026B3 3. Memory: 8MB 4. Bluetooth: 5.4 5. Heart rate sensor: HX3918 + Three-color LED lights 6. Sensor: DA267 7. Temperature sensor: NTC (+-0.5 degrees Celsius) 8. Battery capacity: 13mAh-15mAh 9. Standby time: About 3-5 days 10. Charging method: Magnetic charging (The red light remains on constantly when charging and goes off when fully charged) 11. Waterproof Level: IP68 12. APP : LuckRing 13. APP supports languages: Simplified Chinese, Traditional Chinese, Japanese, Korean, Thai, Vietnamese, Malaysia, Indonesian, Hindi, English, French, German, Italian, Russian, Portugal, Turkish, Hungarian, Dutch, Danish, Greek, Spanish, Polish, Finnish, Czech, Croatian, Swedish, Hebrew, Persian, Arabic 14. Material: Stainless steel + zircon 15. Size 11: Inner Diameter 20.7mm; Circumference 63-65mm Functions: 1. Dynamic heart rate measurement, heart rate variability measurement 2. Measurement of blood oxygen saturation 3. PedometerCalorie consumption 4. Exercise mode (runningBrisk walkingcycling) 5. Multi-dimensional sleep monitoring (Built-in sleep-aid music in the APP) 6. Psychological state, stress measurement 7. Female physiological cycle 8. Remote control of mobile phone for taking photos 9. Care from relatives and friends Packing List: Smart Ring x 1 User Manual x 1 COMPATIBLE Retail Case x 1