R8 Multi-Function Smart Ring Health Tracker with Sleep Heart Rate,Blood Oxygen Monitoring - White/18 ?The R8 smart ring offers a wealth of health and fitness monitoring features,making it an ideal companion for those who want to stay on top of their well-being. Its long battery life ensures continuous tracking,and its accuracy in measurements provides valuable health insights. ?Advanced Health Monitoring: The R8 smart ring is equipped with comprehensive health monitoring features,including calorie tracking,step counting,distance measurement,and sleep monitoring from 8:00 PM to 8:00 AM (automatically extended to 12:00) ?Multi-Sport Modes: Enjoy a range of fitness activities with dedicated modes for running,cycling,skipping,fitness workouts,hiking,yoga,golf,and dancing,allowing you to track your performance accurately ?Heart Rate and Blood Pressure Monitoring: Stay informed about your heart health with real-time heart rate monitoring and precise optical blood pressure measurement ?Blood Oxygen Measurement: The smart ring supports accurate blood oxygen measurement,ensuring you have access to vital health data ?Long Battery Life: With up to 7 days of working time,60 days of standby time,and 180 days of shutdown time,the R8 offers extended battery performance for uninterrupted health monitoring Specifications: ?Main Control: NORDIC NRF52832-CIAA ?Charging Chip: SY8602 ?Accelerometer: QMA6100P ?Battery: Charging Case 400mAh,Ring 23mAh ?Photoelectric PPG Analog Front End (PPG AFE): HX3605 ?Motion Measurement: Calories,Steps,Distance ?Sleep Monitoring: 20:00 ~ 8:00 (Automatically extends to 12:00) ?Multiple Sports Modes: Running,Cycling,Jump Rope,Fitness,Mountaineering,Yoga,Golf,Dance ?Heart Rate Measurement: Supported ?Blood Pressure Measurement: Supported via photoplethysmography (PPG) ?Heart Rate Alert: Not supported ?Blood Oxygen Measurement: Precisely supported ?Blood Glucose Measurement: Not supported (electrochemical measurement) ?Temperature Alert: Not supported ?Automatic Health Monitoring: Supported ?Activity Information Data Storage: Supported ?Historical Data Storage Duration: 7 days rolling ?Low Battery Shutdown: Supported ?OTA Upgrade: Supported ?Automatic Recovery Function: Supported ?Self-Check Function: Supported ?Fast/Slow Broadcast Switching Function: Supported ?Zero-Clearing of Relevant Data at Midnight: Supported ?Step Accuracy: ?Y95% ?Sleep Detection Error: ?��1 hour ?Resting Heart Rate Accuracy: ?��5bpm ?Dynamic Heart Rate Accuracy: ?��20bpm ?Blood Pressure Accuracy: ?��10mmHg (average difference) ?Blood Oxygen Accuracy: ?��3% ?ECG Signal: Suitable for dry skin,no significant noise in waveform quality ?Working Battery Life: 7 days ?Standby Battery Life: 60 days ?Shutdown Battery Life: 180 days ?Shutdown Power Consumption: ?��10uA ?Standby Power Consumption: ?��50uA ?Battery Level Display Error: ?��3% ?Charging Duration (hours): 1?�� 0.5h ?Bluetooth Transmission Strength: 0dB ?Bluetooth Central Frequency Offset: ?��24KHz ?Bluetooth Receiver Signal Strength: ?Y-50dB ?Bluetooth Wireless Sensitivity: ?Y-90dB ?Button Life: ?Y100,000 times ?Average No-Reset Time: ?Y200 hours ?Average Failure-Free Time (MTBF): ?Y1 year ?Speaker Output Effect: No noise,no distortion ?Operating Temperature: 0 ~ 45?? ?Storage Temperature: -10 ~ 55?? ?Operating Humidity: 5% ~ 95% (non-condensing) ?APP System Requirements: Android: 6.0 and above; iOS: 11.0 and above ?Bluetooth Version: 5.2 ?Charging Voltage: 4.6 ~ 5.2V ?APP: Smart Health Package included: ?1 x Smart Ring ?1 x Charging Case ?1 x English User Manual ?1 x Lanyard ?1 x Charging Cable ?Other items not included