The Xiaomi Watch S4 Black is a premium smartwatch that blends classic design with advanced technology. Featuring a stunning 1.43-inch AMOLED display with up to 2200 nits peak brightness, it ensures crystal-clear visibility in any lighting condition. The watch includes 150+ sports modes, advanced health monitoring features such as heart rate, SpO₂, and sleep tracking, plus precise dual-frequency GNSS for outdoor workouts. Powered by HyperOS, it delivers smooth performance, seamless device integration, and up to 15 days of battery life with fast charging support.

• Display: 1.43" AMOLED, 466×466 pixels, 60 Hz, 1500 nits HBM / 2200 nits peak brightness
• Design: Slim aluminum alloy frame with interchangeable bezels & rotating crown
• Battery: 486 mAh, up to 15 days use; 5 mins charge = 2 days use
• Health Monitoring: Heart rate, SpO₂, sleep, stress, one-tap health check
• Sports Modes: 150+ workouts, with skiing fall detection
• GPS: Dual-frequency GNSS (L1+L5) for precise positioning
• Connectivity: Bluetooth 5.3, NFC (region-specific), Bluetooth calling
• Smart Features: HyperOS system, notifications, Xiaomi Smart Hub, music & camera control
• Water Resistance: 5 ATM (50 m depth)
• Compatibility: Android 8.0+ / iOS 14.0+ via Mi Fitness app