Xiaomi Watch S4

The Xiaomi Watch S4 smartwatch with a stunning 1.43-inch AMOLED display boasting 466 × 466 resolution and crystal-clear 326 PPI. With exceptional brightness up to 2200 nits, you'll never struggle to see your screen, even in direct sunlight. The robust 486 mAh battery powers your adventures while 5ATM water resistance lets you swim worry-free. Comprehensive health monitoring and environmental sensors track everything from heart rate to altitude, making this the perfect companion for fitness enthusiasts and everyday users who demand premium technology on their wrist.

Display
Size: 1.43-inch AMOLED screen
Resolution: 466 × 466 pixels
Pixel Density: 326 PPI (sharp and detailed)
Brightness:
Global Brightness: 1500 nits (clear visibility in daylight)
Peak Brightness: 2200 nits (great for HDR or high-brightness scenarios)
 Battery
Capacity: 486 mAh (offers decent to strong battery life depending on usage and optimization)
Water Resistance
Rating: 5ATM — Water-resistant up to 50 meters, suitable for swimming and daily water exposure (not recommended for diving)
Sensors
Heart Rate Sensor (includes blood oxygen monitoring)
Accelerometer
Gyroscope
Geomagnetic Sensor (for directional navigation)
Barometer (for altitude detection)
Ambient Light Sensor (for automatic brightness adjustment)
Hall Sensor (detects magnetic field changes, e.g., for flip-to-wake features)
 Charging Interface
Magnetic Contact Charging — Easy to align and convenient for daily use
Buttons & Controls
Top Button: Rotating crown (used for scrolling, navigation, zoom, etc.)
Bottom Button: Power button (used for power on/off and quick access functions)
Audio Features
Microphone: Supports voice assistant, calls, and voice input
Speaker: Supports voice output, music playback, and call audio