xiaomi watch s4 41mm

Design & DisplayDimensions: 41.2 × 41.2 × 9.5 mmWeight: 32g (without strap)Build: Stainless steel middle frameDisplay: 1.32″ AMOLEDResolution & Refresh Rate: 466 × 466 pixels (352 PPI) with 60Hz refresh rateBrightness: Up to 1500 nits (High Brightness Mode)Strap Options: Available in fluororubber, leather, and Milanese loopsHealth & FitnessSensors: Heart rate, SpO2 (blood oxygen), skin temperature, accelerometer, gyroscope, electronic compass, barometer, and ambient light sensorFeatures: 150+ sports modes (including professional skiing), advanced sleep tracking with a 21-day sleep improvement plan, and female cycle predictionWater Resistance: 5ATM rating (suitable for swimming)Smart Features & ConnectivityBattery: 320 mAh capacityBattery Life: Up to 8 days in light usage, 4 days in normal use, and 3 days in heavy usagePositioning: Independent dual-frequency L1 + L5 GNSS (GPS, Galileo, GLONASS, BeiDou, QZSS)Connectivity: Bluetooth 5.4, NFCAudio: Built-in microphone and speaker for Bluetooth callingSafety: Emergency SOS, fall detection, and an emergency sirenOS: Xiaomi HyperOS 3