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Xiaomi Watch S4
- Display: 1.43-inch AMOLED; 466 × 466; 326ppi
- Brightness / refresh: Up to 1500nits HBM full screen; up to 60Hz depending on interface
- Body: 47.3 × 47.3 × 12.0mm; excluding strap and protrusions; approximately 44.5g without strap
- Strap: Black / Silver: fluororubber; Rainbow: fluororubber and nylon
- Positioning: Independent dual-frequency L1 + L5 GPS / Galileo / GLONASS / BeiDou / QZSS
- Battery: 486mAh; up to 15 days typical use under tests
- Calls: Bluetooth 5.3; paired-phone calls; two microphones
- Compatibility: Android 8.0 or above; iOS 14.0 or above
- Package: One Xiaomi Watch S4 including selected bezel and strap, magnetic charging dock, user manual including warranty notice
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Xiaomi Watch S4 Highlights
- 486 mAh battery
- 1.43-inch OLED display at 60Hz
- 1,500 nits peak brightness
- 5 ATM water resistance
- 44.5 g weight
- Bluetooth 5.3 wireless connection
Compare Xiaomi Watch S4 with Similar Products
Compare Xiaomi Watch S4 specs, features and price with similar smartwatches and alternatives.
Comparison full
0 spaces availableIdentity & design
| Specification | Xiaomi Watch S4 | Amazfit Active 2 Premium Round | Huawei Watch Fit 4 Pro | Huawei Watch GT 5 |
|---|---|---|---|---|
| Brand | Xiaomi | Amazfit | Huawei | Huawei |
| Model | Xiaomi Watch S4 | Amazfit Active 2 Premium Round | Huawei Watch Fit 4 Pro | Huawei Watch GT 5 |
| Announced | 2024, October 29 | Not specified | 2025, May 15 | 2024, September 19 |
| Dimensions | 47.3 × 47.3 × 12.0 mm, excluding strap and protrusions | 43.9 × 43.9 × 9.9 mm without heart-rate sensor base | 44.5 × 40.0 × 9.3 mm | 46 mm: 45.8 × 45.8 × 10.7 mm; 41 mm: 41.3 × 41.3 × 9.5 mm |
| Weight | Approximately 44.5 g without strap | 31.65 g without strap | Approximately 30.4 g (without the strap) | 46 mm: approximately 48 g; 41 mm: approximately 35 g (strap excluded) |
| Build materials | Aluminum-alloy frame | Stainless-steel bezel; polymer middle frame | Glass front (Sapphire Glass), titanium alloy bezel, aluminum mid-frame, polymer fiber back | Stainless-steel front case with high-performance fiber-reinforced composite rear case |
| Wrist size | 140–210 mm (black, silver); 135–210 mm (rainbow) | 150–210 mm | 130-210 mm | 46 mm: 140–210 mm; 41 mm: 120–190 mm (gold configuration: 130–190 mm) |
| Strap / band | Fluororubber; additional nylon strap with rainbow version | 20 mm quick-release leather; pin buckle | Green Nylon Strap; Blue Fluoroelastomer Strap; Black Fluoroelastomer Strap | Configuration-dependent fluoroelastomer, woven, leather, or metal strap |
| Controls / buttons | Rotating crown and side button; touchscreen | Two physical buttons and touchscreen | Home Button (Rotating Crown) and Side Button | Rotating crown, side button, and touchscreen |
Display
| Specification | Xiaomi Watch S4 | Amazfit Active 2 Premium Round | Huawei Watch Fit 4 Pro | Huawei Watch GT 5 |
|---|---|---|---|---|
| Display | 1.43-inch AMOLED | 1.32-inch AMOLED | 1.82 inch AMOLED | 46 mm: 1.43-inch AMOLED; 41 mm: 1.32-inch AMOLED |
| Screen resolution | 466 × 466 pixels; 326 ppi | 466 × 466 pixels; 353 ppi | 480 × 408 pixels, PPI 347 | 466 × 466 pixels; approximately 326 ppi (46 mm) or 352 ppi (41 mm) |
| Display protection | Scratch/drop-proof glass | Sapphire glass | Sapphire glass | Not specified |
| Display features | 60 Hz refresh rate; up to 1,500 nits HBM | Not specified | 3000 nits (peak) | Always-on display supported |
Performance & software
| Specification | Xiaomi Watch S4 | Amazfit Active 2 Premium Round | Huawei Watch Fit 4 Pro | Huawei Watch GT 5 |
|---|---|---|---|---|
| Operating system | Xiaomi HyperOS 2 | Zepp OS | Not specified | HarmonyOS 5.0 |
| RAM | Not specified | Not specified | Not specified | 32MB |
| Storage | Not specified | Not specified | Not specified | 4GB |
Connectivity
| Specification | Xiaomi Watch S4 | Amazfit Active 2 Premium Round | Huawei Watch Fit 4 Pro | Huawei Watch GT 5 |
|---|---|---|---|---|
| Network / cellular | Phone network shared through Bluetooth (Android) | Not specified | No cellular connectivity | No cellular connectivity |
| Wi-Fi | No | Not specified | No | No |
| Bluetooth | Bluetooth 5.3 | Bluetooth 5.2 BLE | 2.4 GHz, supports BT5.2 and BR + BLE | Bluetooth 5.2 BR + BLE, 2.4 GHz |
| NFC | Supported (regional availability) | Not specified | Supported | Yes |
| Positioning / GNSS | GPS; Galileo; GLONASS; BeiDou; QZSS | 5 satellite positioning systems; circularly polarized antenna | L1: GPS + GLONASS + GALILEO + BDS + QZSS; L5: GPS + GALILEO + BDS +QZSS | L1: GPS, GLONASS, Galileo, BeiDou, QZSS; L5: GPS, Galileo, BeiDou, QZSS |
| SIM / eSIM | Not specified | Not specified | No | No |
Audio & communication
| Specification | Xiaomi Watch S4 | Amazfit Active 2 Premium Round | Huawei Watch Fit 4 Pro | Huawei Watch GT 5 |
|---|---|---|---|---|
| Speaker | Supported | Supported | Supported | Supported |
| Microphone | 2 microphones | Supported | Supported | Supported |
| Calling | Bluetooth calling with a connected smartphone | Bluetooth calling | Bluetooth calling when paired with a compatible phone | Bluetooth calling when paired with a compatible phone |
Sensors, health & fitness
| Specification | Xiaomi Watch S4 | Amazfit Active 2 Premium Round | Huawei Watch Fit 4 Pro | Huawei Watch GT 5 |
|---|---|---|---|---|
| Sensors | Heart-rate and blood-oxygen sensor; accelerometer; gyroscope; ambient-light sensor; electronic compass; barometer; Hall sensor | BioTracker PPG; accelerometer; gyroscope; ambient light; geomagnetic sensor; temperature; barometric altimeter | Accelerometer sensor; Gyroscope sensor; Magnetometer sensor; Optical heart rate sensor; Barometer sensor; Temperature sensor; Ambient light sensor; ECG sensor; Depth sensor | Accelerometer; gyroscope; magnetometer; optical heart-rate sensor; barometer; temperature sensor; ambient-light sensor |
| Health & wellness features | Heart rate; blood oxygen; stress monitoring | 24-hour heart rate, SpO₂ and stress; skin temperature; one-tap measurement; high and low heart-rate alerts; low SpO₂ alerts; breathing exercises; PAI; heart-rate recovery; menstrual-cycle tracking | Heart rate, blood oxygen, stress, temperature and ECG-related wellness features; regional availability and medical-use limitations apply | Heart rate, blood oxygen, stress, skin temperature, breathing exercises, and cycle tracking; availability varies by region |
| Sleep tracking | Sleep tracking | Sleep HRV; sleep stages including REM; naps; sleep schedule; breathing quality; sleep score | HUAWEI TruSleep sleep tracking | HUAWEI TruSleep sleep tracking |
| Sports / workout modes | 150+ sports modes | 164 sports modes | Multiple indoor and outdoor workout modes | Multiple indoor and outdoor workout modes |
| Training & outdoor features | Running-form metrics; professional skiing mode; outdoor routes; running courses | Zepp Coach; PeakBeats; training templates; interval training; track running; trajectory correction; virtual pacer | Running, cycling, golf, route and dual-band GNSS outdoor tracking | Running, cycling, golf, route and outdoor navigation features; availability varies by mode and region |
| Safety & emergency features | Skiing fall detection and emergency-contact calling with a connected smartphone | Not specified | Not specified | Fall detection and emergency features where supported; phone and regional availability apply |
| Diving / depth features | Not specified | Not specified | Depth-sensor-supported aquatic features; follow Huawei limits and safety guidance | Not specified |
Battery & durability
| Specification | Xiaomi Watch S4 | Amazfit Active 2 Premium Round | Huawei Watch Fit 4 Pro | Huawei Watch GT 5 |
|---|---|---|---|---|
| Battery capacity | 486 mAh | 270 mAh | Li-Ion 400 mAh | 46 mm: Li-Ion 524 mAh |
| Battery life | Up to 15 days typical use | 10 days typical; 5 days heavy; 19 days Battery Saver; 21 hours continuous GPS | Up to 10 days maximum; 7 days typical use; 4 days with AOD | 46 mm: up to 14 days maximum, 9 days typical, or 5 days with always-on display; 41 mm: up to 7 days maximum, 5 days typical, or 3 days with always-on display |
| Charging | 2-pin magnetic charging dock | Magnetic charging head | Wireless charging | Wireless charging |
| Water resistance | 5 ATM | 5 ATM | 5 ATM; IP6X; Dive (Depth up to 40 metres) | 5 ATM; IP69K |
| Durability / certifications | Not specified | Not specified | Not specified | IP69K-rated dust and water resistance |
Compatibility
| Specification | Xiaomi Watch S4 | Amazfit Active 2 Premium Round | Huawei Watch Fit 4 Pro | Huawei Watch GT 5 |
|---|---|---|---|---|
| Phone compatibility | Android 8.0 or later; iOS 14.0 or later | Android 7 or later; iOS 14 or later | Android 8.0 or later; iOS 13.0 or later | Android 9.0 or later; iOS 13.0 or later |
| Companion app | Mi Fitness | Zepp | HUAWEI Health | HUAWEI Health |
| Colors | Black, Silver, Rainbow | Black Leather | Green, Blue, Black | Configuration and market dependent |
Additional specifications
| Specification | Xiaomi Watch S4 | Amazfit Active 2 Premium Round | Huawei Watch Fit 4 Pro | Huawei Watch GT 5 |
|---|---|---|---|---|
| Case material | Aluminum alloy | Stainless-steel bezel; polymer frame | Mid-frame: Aluminum alloy; Bezel: Titanium alloy | Stainless-steel front; high-performance fibre-reinforced composite back |
| Watch weight without strap | Approximately 44.5g without strap | Not specified | Not specified | Not specified |
| Display material | AMOLED | Not specified | Not specified | Not specified |
| Pixels per inch | 326 ppi | 353 ppi | 347 ppi | Not specified |
| Peak brightness | 1,500 nits HBM | Not specified | 3000 nits | Not specified |
| Cover / touchscreen | Supported | Not specified | Not specified | Not specified |
| Packing list | Watch with bezel and strap; magnetic charging dock; user manual | Watch with standard strap; magnetic charging head; instruction manual | Watch × 1; Charging Cradle (including the charging cable) × 1; Quick Start Guide & Safety Information & Warranty Card × 1 | Watch; charging cradle with cable |
| Third-party fitness apps | Health Connect; Strava; Suunto synchronization | Strava; adidas Running; TrainingPeaks; komoot; Relive; Google Fit; Apple Health | Not specified | Not specified |
| Release status | Available. Released 2024, October 29 | Not specified | Available. Released 2025, May 26 | Available. Released 2024, September 19 |
| Card slot | No | Not specified | No | No |
| Camera | No | Not specified | No | No |
| 3.5 mm headphone jack | No | Not specified | No | No |
| USB | No | Not specified | No | No |
| Radio | No | Not specified | No | No |
| Charging time | Not specified | Approximately 2 hours | Not specified | Not specified |
| Smart recognition | Not specified | 25 strength-training movements; 8 sports movements | Not specified | Not specified |
| Model numbers | Not specified | Not specified | SYA-B29 | VLI-B19 |
| Network speed | Not specified | Not specified | No | Not specified |
| Additional hardware features | Not specified | Not specified | Pulse wave arrhythmia analysis | Not specified |
| Charging input | Not specified | Not specified | 5V-9V DC/2A | Not specified |
| Operating temperature | Not specified | Not specified | –20°C to +45°C | Not specified |
Specs
Xiaomi Watch S4 specifications
Identity & design
| Brand | Xiaomi |
|---|---|
| Model | Xiaomi Watch S4 |
| Announced | 2024, October 29 |
| Dimensions | 47.3 × 47.3 × 12.0 mm, excluding strap and protrusions |
| Weight | Approximately 44.5 g without strap |
| Build materials | Aluminum-alloy frame |
| Wrist size | 140–210 mm (black, silver); 135–210 mm (rainbow) |
| Strap / band | Fluororubber; additional nylon strap with rainbow version |
| Controls / buttons | Rotating crown and side button; touchscreen |
Display
| Display | 1.43-inch AMOLED |
|---|---|
| Screen resolution | 466 × 466 pixels; 326 ppi |
| Display protection | Scratch/drop-proof glass |
| Display features | 60 Hz refresh rate; up to 1,500 nits HBM |
| Display material | AMOLED |
| Pixels per inch | 326 ppi |
| Peak brightness | 1,500 nits HBM |
| Cover / touchscreen | Supported |
Performance & software
| Operating system | Xiaomi HyperOS 2 |
|---|
Connectivity
| Network / cellular | Phone network shared through Bluetooth (Android) |
|---|---|
| Wi-Fi | No |
| Bluetooth | Bluetooth 5.3 |
| NFC | Supported (regional availability) |
| Positioning / GNSS | GPS; Galileo; GLONASS; BeiDou; QZSS |
| USB | No |
| Radio | No |
Audio & communication
| Speaker | Supported |
|---|---|
| Microphone | 2 microphones |
| Calling | Bluetooth calling with a connected smartphone |
Sensors, health & fitness
| Sensors | Heart-rate and blood-oxygen sensor; accelerometer; gyroscope; ambient-light sensor; electronic compass; barometer; Hall sensor |
|---|---|
| Health & wellness features | Heart rate; blood oxygen; stress monitoring |
| Sleep tracking | Sleep tracking |
| Sports / workout modes | 150+ sports modes |
| Training & outdoor features | Running-form metrics; professional skiing mode; outdoor routes; running courses |
| Safety & emergency features | Skiing fall detection and emergency-contact calling with a connected smartphone |
Battery & durability
| Battery capacity | 486 mAh |
|---|---|
| Battery life | Up to 15 days typical use |
| Charging | 2-pin magnetic charging dock |
| Water resistance | 5 ATM |
Compatibility
| Phone compatibility | Android 8.0 or later; iOS 14.0 or later |
|---|---|
| Companion app | Mi Fitness |
| Colors | Black, Silver, Rainbow |
Design
| Case material | Aluminum alloy |
|---|---|
| Watch weight without strap | Approximately 44.5g without strap |
System and package
| Packing list | Watch with bezel and strap; magnetic charging dock; user manual |
|---|
Sports features
| Third-party fitness apps | Health Connect; Strava; Suunto synchronization |
|---|
General
| Release status | Available. Released 2024, October 29 |
|---|
Memory & storage
| Card slot | No |
|---|
Cameras
| Camera | No |
|---|
Audio
| 3.5 mm headphone jack | No |
|---|