Introduction
The Xiaomi Watch S4 is a sophisticated smartwatch designed to enhance your daily life with advanced features and a sleek design. It boasts a vibrant 1.43-inch AMOLED display, offering exceptional clarity and smooth visuals with an astounding HBM brightness of up to 1500 nits. Experience seamless interaction with the upgraded rotating crown, providing quick access to widgets and message previews.
This smartwatch is equipped with over 150 professional sports modes, comprehensive health monitoring, and convenient connectivity features like Bluetooth calls and message alerts. Its long-lasting battery ensures extended usage, making it an ideal companion for both active lifestyles and everyday convenience.

Figure 1: Xiaomi Watch S4 Smartwatch (Black)
What's in the Box
Upon opening your Xiaomi Watch S4 package, you will find the following items:
- Main unit (Xiaomi Watch S4 Smartwatch)
- Charging wire (magnetic charger)
- Instruction manual (English language not guaranteed, but this document serves as a comprehensive guide)

Figure 2: Xiaomi Watch S4 and accessories
Setup Guide
1. Initial Charging
Before first use, it is recommended to fully charge your Xiaomi Watch S4. Connect the magnetic charging wire to the charging contacts on the back of the watch. Connect the USB end of the charging wire to a compatible USB power adapter (not included) or a computer USB port. A 5-minute fast charge can provide up to 2 days of usage, and a full charge typically lasts up to 15 days depending on usage.

Figure 3: Charging the Xiaomi Watch S4
2. Pairing with Your Smartphone
- Download the official Xiaomi Wear app (or Mi Fitness app) from your smartphone's app store (Google Play Store for Android, Apple App Store for iOS).
- Open the app and follow the on-screen instructions to create or log in to your Xiaomi account.
- Turn on your Xiaomi Watch S4 by pressing and holding the side button.
- In the app, select "Add device" or "Pair new device" and choose Xiaomi Watch S4 from the list of available devices.
- Confirm the pairing request on both your watch and smartphone.
- Once paired, follow the app's instructions to complete initial setup, including personal information and notification preferences.
Operating Your Smartwatch
Display Navigation
The Xiaomi Watch S4 features a responsive touchscreen and an upgraded rotating crown for intuitive navigation:
- Swipe: Swipe left/right to access widgets, and up/down to view notifications or quick settings.
- Tap: Tap on icons or options to select them.
- Rotating Crown: Rotate the crown for quick scrolling through lists, adjusting volume, or zooming. Press the crown to return to the watch face or access the app list.
Sports Modes and Activity Tracking
With over 150 professional sports modes, the Watch S4 accurately tracks a wide range of activities. Select your desired sport from the workout menu to begin tracking. Advanced dual sensors enhance motion detection for more accurate data.
Health Monitoring
The smartwatch continuously monitors your health metrics:
- Heart Rate & Blood Oxygen: Real-time monitoring through the integrated sensor.
- Sleep Analysis: Provides detailed breakdown of light, deep, and REM sleep stages for a clear sleep score.
- Other Sensors: Accelerometer, Gyroscope, Ambient light sensor, Electronic compass, Barometer sensor, and Hall sensor contribute to comprehensive tracking.

Figure 4: Rear view of the Xiaomi Watch S4 with sensors
Connectivity and Smart Features
- Bluetooth Calls & Message Alerts: Stay connected by receiving calls and messages directly on your wrist.
- On-wrist Music Controls: Manage your music playback without reaching for your phone.
- Weather Updates: Get real-time weather information.
- Gesture Control: Utilize quick wrist movements (twist or flick) to operate customized functions like rejecting calls, activating Alexa, or taking photos.
- Watch Faces: Personalize your watch with hundreds of available watch face designs, from elegant to dynamic.
- Interchangeable Bezel: The Xiaomi Watch S4 features a textured bezel that can be interchanged. Installing a dress-up bezel automatically switches to a dedicated watch face with sound, offering a unique interactive experience.

Figure 5: Xiaomi Watch S4 showcasing the interchangeable bezel
Maintenance
Cleaning Your Smartwatch
To maintain the appearance and functionality of your Xiaomi Watch S4, regularly clean the watch body and strap. Use a soft, lint-free cloth. For stubborn dirt, slightly dampen the cloth with water. Avoid using harsh chemicals or abrasive materials.
Charging Best Practices
- Always use the provided magnetic charging cable.
- Ensure the charging contacts on the watch and cable are clean and dry before charging.
- Avoid exposing the watch to extreme temperatures during charging.
Troubleshooting
Common Issues and Solutions
| Issue | Possible Cause | Solution |
|---|---|---|
| Watch not turning on | Low battery | Charge the watch for at least 30 minutes. |
| Unable to pair with phone | Bluetooth off, app issue, or watch not in pairing mode | Ensure Bluetooth is on, restart both devices, and try pairing again through the app. |
| Inaccurate health data | Loose fit, dirty sensors | Ensure the watch is snug on your wrist and clean the sensors on the back. |
| Short battery life | Frequent GPS use, high brightness, always-on display | Adjust settings (brightness, always-on display), limit GPS usage, and ensure full charge cycles. |
If you encounter issues not listed here, please refer to the official Xiaomi support website or contact customer service.
Specifications
| Feature | Detail |
|---|---|
| Model Number | M2425W1 (BHR9195GL) |
| Display | 1.43-inch AMOLED, 466 x 466 pixels, 326 PPI, 60 Hz refresh rate, up to 1500 nits HBM brightness |
| Battery Life | Up to 15 days (typical usage), 486 Milliamp Hours |
| Charging | Magnetic charging, 5 minutes fast charge for 2 days usage |
| Sports Modes | 150+ professional sports modes |
| Sensors | Heart rate (with blood oxygen), Accelerometer, Gyroscope, Ambient light, Electronic compass, Barometer, Hall sensor |
| Connectivity | NFC, Bluetooth, Built-in GPS (GPS, Galileo, Glonass, BeiDou, QZSS) |
| Operating System | Wear OS 2.6 (HyperOS) |
| Memory Storage Capacity | 512 MB |
| Item Weight | 44.5 Grams (1.57 ounces) |
| Manufacturer | Xiaomi |
| Country of Origin | China |
Warranty and Support
For warranty information and customer support, please refer to the official Xiaomi website or contact their authorized service centers. Keep your purchase receipt as proof of purchase for warranty claims.
Additional protection plans may be available for purchase through authorized retailers. These plans typically offer extended coverage beyond the standard manufacturer's warranty.
- Manufacturer: Xiaomi
- Online Support: Visit the Official Xiaomi Store on Amazon for product information and support resources.