Large, Ultra-Bright Display:1.72-inch AMOLED screen with 1,500 nits peak brightness and a smooth 60Hz refresh rate.Massive Battery Life:Up to 21 days of typical use on a single charge; refuels completely in about 60 minutes.Fluid Performance:Runs on Xiaomis latest HyperOS 2 with a high-quality linear vibration motor for premium haptic alerts.All-Day Health Metrics:24/7 continuous heart rate, blood oxygen (SpO2), stress monitoring, and comprehensive sleep analytics.Extensive Fitness Tracking:Over 150 sports modes, including pool swimming with a 5ATM waterproof rating.Ecosystem Control:Allows direct control of compatible smart appliances, phone cameras, and earphones right from the wrist.Smart Connectivity:Features a new Bluetooth heart rate broadcast mode to sync data with external gym equipment.GPS Dependency:Lacks built-in GPS; requires a connected smartphone to map outdoor routes.