Dimensions
47.3mm x 47.3mm x 12.0mm
*Height, width and thickness dimensions exclude the strap and protrusions
44.5g approx. (without inbox strap)
Frame
Aluminum alloy frame
Strap
Black: fluororubber strap
Adjustable strap length: 140-210mm approx.
Silver: fluororubber strap
Adjustable strap length: 140-210mm approx.
Rainbow: fluororubber strap+nylon strap
Adjustable strap length: 135–210mm approx.
Sensors
Heart rate sensor (with blood oxygen sensor) | Accelerometer | Gyroscope | Ambient light sensor | Electronic compass | Barometer sensor | Hall sensor
Satellite positioning systems
GPS | Galileo | Glonass | BeiDou | QZSS
Battery
Typical usage time: 15 days
Capacity: 486mAh
Display
Resolution: 466 x 466 pixels,PPI 326
1.43-inch AMOLED display
60Hz refresh rate
*Display refresh rate may vary across different interfaces. Please refer to the actual usage scenario.
Brightness: HBM 1500 nits
*The HBM brightness is the maximum brightness when the entire screen lights up.
Specifications
Built-in GNSS: Supported
Water 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: Supported
Microphone: 2 mics
NFC: 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® 5.3
Operating system: Xiaomi HyperOS 2
Compatibility: Supports smartphones with Android 8.0 and above, or iOS 14.0 and above.
Charging port: 2-Pin magnetic charging dock
Dimensions
47.3mm x 47.3mm x 12.0mm
*Height, width and thickness dimensions exclude the strap and protrusions
44.5g approx. (without inbox strap)
Frame
Aluminum alloy frame
Strap
Black: fluororubber strap
Adjustable strap length: 140-210mm approx.
Silver: fluororubber strap
Adjustable strap length: 140-210mm approx.
Rainbow: fluororubber strap+nylon strap
Adjustable strap length: 135–210mm approx.
Sensors
Heart rate sensor (with blood oxygen sensor) | Accelerometer | Gyroscope | Ambient light sensor | Electronic compass | Barometer sensor | Hall sensor
Satellite positioning systems
GPS | Galileo | Glonass | BeiDou | QZSS
Battery
Typical usage time: 15 days
Capacity: 486mAh
Display
Resolution: 466 x 466 pixels,PPI 326
1.43-inch AMOLED display
60Hz refresh rate
*Display refresh rate may vary across different interfaces. Please refer to the actual usage scenario.
Brightness: HBM 1500 nits
*The HBM brightness is the maximum brightness when the entire screen lights up.
Specifications
Built-in GNSS: Supported
Water 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: Supported
Microphone: 2 mics
NFC: 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® 5.3
Operating system: Xiaomi HyperOS 2
Compatibility: Supports smartphones with Android 8.0 and above, or iOS 14.0 and above.
Charging port: 2-Pin magnetic charging dock
The Xiaomi Watch S4 is a premium smartwatch with a lightweight aluminum alloy frame and a stunning 1.43-inch circular AMOLED display (466 × 466 pixels, 326 PPI) with 60Hz refresh rate and HBM 1500 nits brightness.
It comes equipped with a full range of sensors including heart rate, SpO₂, accelerometer, gyroscope, ambient light, compass, barometer, and hall sensor.
With a 486mAh battery, it offers up to 15 days of usage and charges via 2-pin magnetic dock.
Features include Bluetooth calling, 5ATM water resistance, built-in GNSS (GPS, Galileo, Glonass, BeiDou, QZSS), dual microphones, and NFC support.
Runs on Xiaomi HyperOS 2 and supports smartphones running Android 8.0+ or iOS 14.0+.
Please contact us at [email protected] with your questions and we will post answers here.