Xiaomi Watch S4 features a round 1.32-inch display with a gold finish, 5ATM water resistance, real-time heart rate monitoring, and a digital temperature sensor for skin readings. It offers health insights like menstrual cycle prediction based on temperature changes. The watch runs on Xiaomi HyperOS with gesture controls for quick actions such as rejecting calls or taking photos remotely. Bluetooth 5.4 ensures fast, stable connections to phones and other Xiaomi devices. It supports multiple strap options (fluoro rubber, leather, stainless steel) and includes a 320 mAh battery lasting up to 8 days with light use or 3 days with heavy use. Weight is 32 g without the strap.
| Type | | Smart Watch | |
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| Display Size | | 1.32 inches (round) | |
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| Display Resolution | | 466 x 466 px | |
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| Water Resistance | | 5 ATM | |
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| Case Dimensions | | 41.2 x 41.2 x 9.5 mm | |
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| Strap Material | | Fluoro rubber, leather, stainless steel | |
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| Band Adjustment | | 120–190 mm | |
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| Connectivity | | Bluetooth 5.4 | |
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| Sensors | | Accelerometer, Gyroscope, Light sensor, Barometer, Optical heart rate monitor, Digital temperature sensor | |
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| Battery Capacity | | 320 mAh | |
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| Battery Life | | Up to 8 days (light use) or 3 days (heavy use) | |
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| Weight | | 32 g (without strap) | |
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| Color | | Gold | |
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