Features: [1.56-inch Full Screen] 1.56-inch AMOLED full screen, 152*486 resolution, 326PPI, the screen brightness can be adjusted. The APP has a built-in 130+ exclusive band dial, which can be changed according to hobbies and moods. [30 Sports Modes] Supports 30 kinds of sports modes. Automatically recognize 6 kinds of exercise modes - walking, treadmill, outdoor running, outdoor cycling, rowing machine, elliptical machine, never miss every moment of exercise. [Heart Rate Monitoring] The built-in PPG biosensor can monitor your heart rate changes in 24 hours. and also supports heart rate warning, it will vibrate when the heart rate is too high. [Blood Oxygen Monitoring] Equipped with an excellent sensor, through the light path design and multiple light source fusion, professional algorithm support, allowing you to accurately measure blood oxygen anytime anywhere. [Sleep Monitoring] Support sleep monitoring. It can accurately record the length of sleep, scientifically analyze sleep