Dimensions
41.2mm × 41.2mm × 9.5mm
*Height, width and thickness dimensions exclude the strap and protrusions.
32g approx. (without inbox strap)
Frame
Stainless steel
Strap
Black: fluororubber strapAdjustable strap length: 120-190mm approx.
Mint green: fluororubber strapAdjustable strap length: 120-190mm approx.
White: leather strapAdjustable strap length: 120-190mm approx.
Sunset gold: Milanese strapAdjustable strap length: 130-190mm approx.
Sensors
Heart rate sensor (with blood oxygen sensor) | Accelerometer | Gyroscope | Ambient light sensor | Electronic compass | Barometer sensor | Temperature sensor
Satellite positioning systems
GPS | Galileo | Glonass | BeiDou | QZSS
Battery
Light usage time: up to 8 daysNormal usage time: up to 4 daysHeavy usage time: up to 3 daysCapacity: 320mAh
Display
Resolution: 466 × 466 pixels，PPI 3521.32-inch AMOLED display60Hz refresh rateBrightness: HBM 1500nits*Display refresh rate may vary across different interfaces. Please refer to the actual usage scenario.*The HBM brightness is the maximum brightness when the entire screen lights up.
Specifications
Built-in GNSS: SupportedWater resistance rating: 5ATM*The 5ATM water resistance rating (equivalent to a depth of 50 meters) means it can be worn in swimming pools, while swimming near the shore, and during other shallow water activities. It is not suitable for wearing in hot showers, saunas, or while diving. Make sure to avoid direct impacts from swift currents during water sports. Water resistance is not permanent and may deteriorate over time.Speaker: SupportedMicrophone: 1 micNFC: Supported*NFC availability may vary by region.Bluetooth calling: Supported*The watch must be kept connected to the smartphone's Bluetooth. Voice calls from third-party apps are not currently supported.Wireless connectivity: Bluetooth® 5.4Operating system: Xiaomi HyperOS 3Compatibility: Supports smartphones with Android 8.0 and above, or iOS 14.0 and above.Charging port: 2-Pin magnetic charging dock
Package contents
Xiaomi Watch S4 41mm / Magnetic charging dock / User manual (including warranty notice)
