HR02 SIZE 10 Smart Ring, Supports Health Monitoring Female Menstrual Cycle Gesture Control 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 + epoxy resin 15. Size 10: Inner Diameter 19.9mm; Circumference 62.5mm 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