Dimensions: 41.2mm ? 41.2mm ? 9.5mm
Weight: Approx. 32g
Frame: Stainless steel
Sensors: Heart rate sensor with blood oxygen; Accelerometer; Gyroscope; Ambient light sensor; Electronic compass; Barometer sensor; Temperature sensor
Satellite positioning systems: GPS; Galileo; GLONASS; BeiDou; QZSS
Battery: Light usage up to 8 days; Normal usage up to 4 days; Heavy usage up to 3 days; Capacity 320mAh
Display: 1.32-inch AMOLED; Resolution 466 ? 466 pixels; 352 PPI; 60Hz refresh rate; Brightness up to 1500 nits (HBM)
Built-in GNSS: Supported
Water resistance rating: 5 ATM
Speaker: Supported
Microphone: 1 mic
NFC: Supported
Bluetooth calling: Supported
Wireless connectivity: Bluetooth® 5.4
Operating system: Xiaomi HyperOS 3
Compatibility: Android 8.0 and above; iOS 14.0 and above
Charging port: 2-pin magnetic charging dock
Package contents: Xiaomi Watch S4 41mm; Magnetic charging dock; User manual
