HD AMOLED display: The peak brightness of the AMOLED display reaches 1200nits, and the information is still easily visible under strong sunlight. Equipped with a photosensitive module, it can accurately sense the ambient light and intelligently adjust the display brightness for a more comfortable viewing experience Fashionable metal texture: Use an aluminum alloy middle frame and match it with a fashionable wristband, which is elegant and beautiful A variety of dials can be changed at will: There are multiple types of dials with comprehensive styles. You can change them according to your personal preferences, mood and outfit Sleep health management: Through high-precision sensors, sleep is accurately monitored and data is recorded and analyzed, and professional institutions are teamed up to provide more sleep suggestions to further improve your sleep quality High-precision sensors: All-day heart rate monitoring, all-day blood oxygen saturation monitoring, all-day pressure monitoring function Multiple sports modes: Whether you are riding outdoors or sweating indoors, you can track various data more accurately to give you the motivation to keep moving forward Specifications: Version: Global Version Size: 46.53*21.63*10.95cm Weight: 27.4g Screen: 1.62-inch AMOLED touch screen Screen resolution: 192*490, supports full-screen touch operation Screen brightness: up to 1200nits, supports automatic brightness adjustment Cover material: 2.5D tempered glass cover Shell material: Standard version: aluminum alloy middle frame + fiber high-strength polymer Sensor: acceleration sensor, gyroscope sensor, optical heart rate and blood oxygen sensor, ambient light sensor Waterproof level: 5ATM Wireless connection: Bluetooth 5.4 Vibration motor: linear motor Battery capacity: 233mAh Battery type lithium-ion polymer battery Charging time: about 1 hour Usage time: ≥21 days Adjustable wristband length: 135-210mm Standard version of wristband material: TPU Supported system: Android 8.0 or iOS 12.0 and above Supported APP: Mi Fit