Fangrui Product Details 1. Dual Pd Real-time Heart Rate Blood Oxygen Real-time Sleep Exercise Health Bracelet 2. Watch Strap: Nylon Strap 3. Battery: 145mah 4. Chip: Jl7012 5. Bluetooth: Bt5.3 6. Screenless Design, No Restraint, Integrated Body, Comfortable And Fit 7. 24-hour Health Monitoring, Wrist Heart Rate, Blood Oxygen, Heart Rate Variability, Stress, Sleep Score And Other Data, As Well As More Related Information, The Sensor System Can Help You Monitor Various Important Indicators Of Your Body 8. Multi-sport Mode: Mountaineeringwalkingjoggingyogaswimmingelliptical Exercise 9. Adopt Low-power Chips, Greatly Improve Performance, Charge Anytime, Anywhere 10. Ip68 Has High Waterproofing, Can Prevent Water And Dust, Suitable For Swimming, Bathing, Showering And Rain 11. The Period Management Function Allows You To Understand Your Special Period At A Glance, Including Complete Records Of Menstrual Periods, Ovulation Periods And Safety Periods, As Well As Cycle Prediction And Period Reminder Functions To Help You Understand Yourself Better. 12. Mobile Application, Real-time Monitoring Of Data, You Need To Connect The Bracelet Through The Mobile Phone Bluetooth To Keep Bluetooth Enabled. When The Application Starts, Bluetooth Will Automatically Connect. When It Is Not Connected To 12. When The Mobile Phone Is Not Connected, The Bracelet Can Also Independently Monitor The Physical Condition, Record Blood Oxygen And Heart Rate Status, And Update The Data To The Application After Connecting. 13. Width: 22mm 14. Thickness: 11mm 15. Periphery: 225mm 16. Weight: 40 G