Product parameters Bracelet length: 24.5CM Bluetooth: Bluetooth 4.0 support Screen display: 1.3 inch IPS color display Resolution: 240x240 pixels Unlock method: Capacitive touch screen unlock Battery capacity: 180 mAh Working time : 7 days Standby time: 25 days Waterproof rating : IP67 Sensor: Three-axis sensor / green heart rate sensor Product weight: 35 grams Device support: Android 4.4 or above, IOS 8.0 or above Supported languages: Chinese Simplified English Chinese Traditional Korean German Japanese Spanish French Russian Arabic Ukrainian Sports Record: Step, exercise time, exercise mileage, calorie consumption, sleep monitoring, save 30 days of exercise/sleep data Health monitoring: real-time heart rate measurement (dynamic, static), blood pressure measurement (can set timing blood pressure measurement), blood oxygen measurement Smart reminder: Custom alarm reminder, drink reminder, sedentary reminder, call reminder, information push (SMS/QQ/WeChat/Skype/Facebook/Twitter/Line/WhatsApp/LinkedIn/Instagram/TIM/SnapChat), anti-lost reminder Other functions: raise the screen, training mode, time display, weather forecast, remote camera, do not disturb mode settings, find bracelet, WeChat sports, bracelet to reject calls, support APP air upgrade, music control, blood pressure timing monitoring, Automatic heart rate calibration