Product details
The Xiaomi Watch S4 41mm combines a compact stainless steel watch body with four supplied style options. Black and Mint Green versions have fluororubber straps, White has a leather strap, and Sunset Gold has a Milanese strap. Choose the colour that matches your preferred strap material and fit. Each selection contains one complete watch rather than a replacement strap alone.
The body measures 41.2 × 41.2 × 9.5mm, excluding the strap and protrusions, and weighs approximately 32g without the supplied strap. Black, Mint Green and White straps fit wrists approximately 120–190mm; the Sunset Gold Milanese strap fits approximately 130–190mm. A rotatable crown and lower button provide physical controls alongside the touchscreen.
Its 1.32-inch AMOLED display has 466 × 466 resolution, 352 pixels per inch and up to 1500nits HBM full-screen brightness. The 60Hz refresh rate varies across interfaces. Configurable watch faces and always-on display support different ways to show information. Xiaomi HyperOS 3 powers the supported interface and connected functions, with features depending on current firmware and compatible phone software.
Heart rate, blood oxygen, stress and sleep monitoring provide everyday wellness records. Skin-temperature tracking records skin trends rather than core body temperature. The Mi Fitness app controls relevant monitoring settings and supported cycle predictions. These features provide general wellness information. More than 150 sports modes, workout reports and Bluetooth heart-rate broadcasting support compatible exercise equipment.
Independent dual-frequency L1 and L5 positioning supports GPS, Galileo, GLONASS, BeiDou and QZSS. Bluetooth 5.4 connects the watch to a smartphone for supported calls through its speaker and microphone. Keep the phone connected; third-party app voice calls are not supported. NFC and payment availability depend on region and participating services. Phone compatibility starts at Android 8.0 or iOS 14.
The 320mAh battery is rated for up to eight days of light use, four days of normal use or three days of heavy use under Xiaomi’s test conditions. Actual runtime varies. Charging uses the included two-pin magnetic dock. The 5ATM watch rating supports appropriate shallow-water use, excluding hot showers, saunas and diving; protect leather straps from water. The package includes the watch, magnetic charging dock and user manual with warranty notice.
