Xiaomi Watch S4
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At a glance
Key specifications and important differences. Full details follow below.
| Feature |  Xiaomi Watch S4 |
|---|---|
| Price | KSh 20,000.00 |
| Display | 1.43-inch AMOLED, 60 Hz |
| Battery capacity | 486 mAh |
| Water resistance | 5 ATM rated for suitable shallow-water activities |
| Operating system | Xiaomi HyperOS 2 |
| Positioning / GNSS | Built-in GPS, Galileo, GLONASS, BeiDou and QZSS |
| Health & wellness features | Heart rate, blood oxygen, stress, breathing and activity tracking; wellness data is not intended for medical diagnosis |
Full specifications
1 of 4 products
| Specification | Xiaomi Watch S4 |
|---|---|
| Identity & design | |
| Brand | Xiaomi |
| Model | Xiaomi Watch S4 |
| Announced | March 2025 (global model) |
| Dimensions | 47.3 × 47.3 × 12.0 mm (strap and protrusions excluded) |
| Weight | Approximately 44.5 g (strap excluded) |
| Build materials | Aluminum-alloy frame with interchangeable bezel |
| Wrist size | Black/Silver: approximately 140–210 mm; Rainbow: approximately 135–210 mm |
| Strap / band | Fluororubber; Rainbow configuration also includes nylon strap |
| Controls / buttons | Rotating crown, side control, interchangeable bezel interaction, and touchscreen |
| Display | |
| Display | 1.43-inch AMOLED, 60 Hz |
| Screen resolution | 466 × 466 pixels (~326 ppi) |
| Display features | Always-on display; up to 1,500 nits HBM |
| Performance & software | |
| Operating system | Xiaomi HyperOS 2 |
| Connectivity | |
| Bluetooth | Bluetooth 5.3 |
| NFC | Supported; availability varies by region |
| Positioning / GNSS | Built-in GPS, Galileo, GLONASS, BeiDou and QZSS |
| Audio & communication | |
| Speaker | Built-in speaker |
| Microphone | Two built-in microphones |
| Calling | Bluetooth calling when paired with a compatible phone; third-party app voice calls not supported |
| Sensors, health & fitness | |
| Sensors | Heart-rate/blood-oxygen sensor, accelerometer, gyroscope, ambient-light sensor, electronic compass, barometer and Hall sensor |
| Health & wellness features | Heart rate, blood oxygen, stress, breathing and activity tracking; wellness data is not intended for medical diagnosis |
| Sleep tracking | Sleep monitoring supported |
| Sports / workout modes | More than 150 sports modes |
| Battery & durability | |
| Battery capacity | 486 mAh |
| Battery life | Up to 15 days typical use; actual life varies by settings and use |
| Charging | 2-pin magnetic charging dock |
| Water resistance | 5 ATM rated for suitable shallow-water activities |
| Compatibility | |
| Phone compatibility | Android 8.0 or later; iOS 14.0 or later |
| Companion app | Mi Fitness |
| Colors | Black, Silver, or Rainbow depending on configuration |