Introduction
The Xiaomi Mijia Eight-Electrode Body Fat Scale S800 is designed to provide a comprehensive analysis of your body composition. Utilizing eight electrodes and dual-frequency bioelectric impedance measurement, it offers detailed insights into various physical indicators, including body fat, muscle mass, and water content. This manual will guide you through the setup, operation, maintenance, and troubleshooting of your device.
Important Note: Due to logistics, AA batteries may be removed from the product packaging. Please ensure you have 4 AA alkaline batteries for operation.
Setup Guide
1. Battery Installation
- Locate the battery compartment on the underside of the scale.
- Open the battery cover.
- Insert 4 AA alkaline batteries, ensuring correct polarity.
- Close the battery cover securely.
2. App Installation and Region Setting
The Xiaomi Mijia Eight-Electrode Body Fat Scale S800 is a Chinese version and requires specific app settings for proper functionality.
- Download and install the Mi Home APP or Xiaomi Health APP on your smartphone.
- Ensure your mobile phone operating system is upgraded to Android 8.0 or iOS 12.0 (or above).
- Open the app and navigate to your profile settings.
- Crucial Step: Switch the country/region location in the app to "Chinese mainland" before use.

3. Device Pairing
- Ensure Bluetooth is enabled on your smartphone.
- Open the Mi Home APP or Xiaomi Health APP.
- Follow the in-app instructions to add a new device. The scale uses Low Power Bluetooth 5.0 for connection.
- After the first binding, the body fat scale will automatically establish a connection with any Bluetooth gateway device in your home within 1 to 5 minutes.
Operating Instructions
1. Taking a Measurement
- Place the scale on a hard, flat surface.
- Step onto the scale barefoot. Ensure your feet are in full contact with the ITO large scale surface.
- For eight-electrode measurement, hold the handle electrode sheet firmly with both hands. Ensure your hands are also in full contact with the electrodes.
- Stand still until the measurement is complete and the data is displayed on the scale's interactive display and synchronized to the app.


2. App Features and Data Management
The Mi Home APP and Xiaomi Health APP provide comprehensive data analysis and management:
- 40 Physical Indicators: The app provides multi-dimensional interpretation of human body composition, including Body Form, Physical Score, Body Weight, BMI, Body Fat Percentage, Fat Mass, Muscle Mass, Visceral Fat Grade, and more.
- Cloud Storage: Historical data is automatically synchronized to the cloud via Bluetooth or Bluetooth gateway, allowing you to view changes over time.
- Multi-Account Management: The app supports storing health data for up to 36 family members, helping to manage health needs for the entire family.

3. Measurement Tips for Accuracy
- Wear light clothing for measurements.
- Measure at the same time and under the same conditions every day.
- It is suggested to measure on an empty stomach in the morning for more accurate figures.
- Avoid measuring after drinking a large amount of water, eating a lot, doing vigorous exercise, or taking a bath, as these can impact results.
Maintenance
Cleaning the Scale
- To clean the scale surface, use a soft cloth slightly dampened with water.
- Do not use abrasive cleaners or immerse the scale in water.
- Ensure the scale is completely dry before storage or next use.
Storage
- Store the scale in a cool, dry place away from direct sunlight and extreme temperatures.
- Avoid placing heavy objects on the scale when not in use.
Troubleshooting
"Not connected to the Bluetooth Mesh gateway" message
This message indicates that the body fat scale is not connected to a Bluetooth gateway device. It is not a device failure.
- This function requires a Bluetooth gateway device at home. If you do not have one, you can ignore this message.
- After the first binding of the body fat scale, it will automatically establish a connection with the gateway within 1 to 5 minutes.
- If the connection is not established after 5 minutes, try powering off and restarting your Bluetooth gateway device.
- You can check compatible Bluetooth gateway devices at https://home.mi.com/balke/index.html#/abel/ability/688967186000000001.
Cannot find the body fat scale when adding a device in the APP
- First, remove the body fat scale from the Mi Home APP or Xiaomi Health APP if it was previously added.
- Open the battery cover, use a pin to press and hold the Reset button for 7 seconds to reset the scale.
- Then, attempt to bind and connect using the Mi Home APP or Xiaomi Health APP again.
- Ensure your mobile phone operating system is upgraded to Android 8.0 or iOS 12.0 or above.
Frequent inability to measure body fat
- It is recommended to wipe the soles of your feet and the scale surface with a slightly damp towel before measurement.
- If the problem persists, use the Mi Home APP or Xiaomi Health APP to connect the device and measure it online. Select the member you want to measure, click "Measure", and follow the prompts to walk barefoot on the scale, ensuring full contact with the surface.
Specifications
| Feature | Detail |
|---|---|
| Product Name | Mi Home Eight-Electrode Body Fat Scale S800 |
| Product Model | MJTZC04YM |
| Product Dimensions | 320 × 345 × 35mm |
| Net Weight | Approximately 2.4 kg |
| CMIIT ID | 24J440M7B412 |
| Weighing Range | 0.1 to 150 kg |
| Weighing Unit | kg |
| Shell Material | Tempered glass + engineering plastic |
| Minimum Division | 0.05 kg |
| Power Supply | AA alkaline battery × 4 |
| Operating Temperature | 0℃ to 40℃ |
| Wireless Connection | Low Power Bluetooth 5.0 |
| Rated Power | 1200mW |
| Rated Voltage | 6V |
| Supported System | Android 8.0 or iOS 12.0 and above versions |
| Features | Flashing, Bluetooth-Compatible, Ready-to-Go |
| Certification | CE |
| High-concerned chemical | None |
Warranty and Support
For warranty information, please refer to the documentation provided with your purchase or contact Xiaomi customer support directly. This product is covered by standard manufacturer warranties.
Important Safety Information and Disclaimers
- This product is not recommended for people with implanted medical devices (such as pacemakers, cochlear implants, etc.). The current used in this product is harmless to the human body, but caution is advised.
- Pregnant women should use this product with caution.
- If the user is in an unwell state (e.g., fever, cold, gastroenteritis), there may be significant errors in body composition measurements due to special physical conditions. The measurement results are for reference only.
- This product is not a medical device. The measurement data and results are for reference only and should not be used as the basis for diagnosis or treatment.
- The health data and advice provided may vary under different conditions.
- This product is only for measuring parameters such as human weight and body fat and must not be used for commercial purposes.
User Tips
- App Region Setting: Remember to set your app's region to "Chinese mainland" for full functionality, as this is a Chinese version product.
- Consistent Measurements: For the most accurate and comparable results, always measure at the same time of day, preferably in the morning on an empty stomach.
- Ensure Good Contact: If you experience issues with body fat measurement, ensure both your bare feet and hands (when using the handle) are clean and making good contact with the electrodes. Wiping them with a slightly damp towel can help.
- Bluetooth Gateway: If you have a Bluetooth Mesh gateway at home, the scale will automatically connect to it for data synchronization even when the app is not open. If you don't have one, direct app connection is still possible.






