Customize your own watch face: Your smartwatch has more than 100 watch faces to choose from. You can also customize your watch faces. Set up any photos you want. Heart rate and sleep measurement: You can choose automatic heart rate monitoring, which gives you accurate results, helps you better understand your health, and make reasonable adjustments to your lifestyle. The bracelet also records your sleep quality, which helps you analyze your sleep and improve your sleep habits. You can then get a full report in the app. Many more features: The fitness bracelet also offers a number of handy features such as activity tracker (pedometer, calories, distance), PPG/ECG detection, AI assistance diagnosis report, blood oxygen, body temperature, 158 sports modes, etc. Get notifications for calls, text and app notifications, alarm clock and more functions to meet your daily needs. Specifications: Watch size: 53.5x46.7mm Charging method: magnetic charging cable APP:H-band Support system: iOS: Supports systems 10.0 and above, of which 13 and above support dual-mode one-click linking. BT under 13 must be connected through the Bluetooth system settings of the mobile phone. Android: Supports system 5.0 and above Hongmeng: All supported Screen size: 1.41" round screen Resolution: 360*360 (sRGB high color gamut) Battery capacity: 3.7V/300 mAh Please note: Health metrics such as blood pressure, SpO₂, and heart rate are provided for reference only. They are not intended for medical use and cannot replace professional medical equipment. Package includes: 1 x smartwatch 1 x charging cable manual