Screen size: 1.32 inches 360 * 360PX Battery capacity: 260mAh App operating system: IOS 9.0 or above, Android 4.4 or above Product size: 45.6 * 49 * 11.5mm Specifications: 1 [Support AI voice intelligence for easy operation] Connect to your phone, be able to listen, do, and be on call, easily complete daily functions through voice assistant 2 [ Multiple Sports Modes ] Supports multiple professional sports modes, based on precise real-time heart rate detection and Al algorithm. The watch will record various data during movement in real-time, ensuring more efficient and safe movement. 3 [24-hour heart rate monitoring] The watch is equipped with a professional heart rate sensor to detect the speed of heart beat. Simultaneously supporting 24-hour uninterrupted high-precision heart rate monitoring, allowing you to have a better understanding of your own health 4 [ Precise Control] Simply gently rotate the "rotating crown" to accurately identify various items, providing a smooth and enjoyable experience for you. The goal is direct and easy to interact with. Package Included: 1 * Watch 1 * Charging cable 1 * Instructions