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: 95% 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: -50dB Bluetooth Wireless Sensitivity: -90dB Button Life: 100,000 times Average No-Reset Time: 200 hours Average Failure-Free Time (MTBF): 1 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