1. Introduction
The XIAOMI MIJIA Wireless Anti-tangle Floor Washer 4C (Model D304) is an advanced wet and dry vacuum cleaner designed to provide a comprehensive and hygienic cleaning solution for your home. This device combines powerful suction with a unique anti-tangle system and self-cleaning capabilities, ensuring spotless floors and a healthier living environment. It features 60°C constant-temperature deep sterilization, 15,000Pa strong suction, and an innovative 8-step self-cleaning process.
Key Features:
- Professional Cleaning and Sterilization: Achieves 60°C constant-temperature deep sterilization with a 99.99% bacteria elimination rate.
- Real-time Full-Link Sterilization: Covers the clean water tank, pipelines, roller brush, and more using electrolyzed water.
- Powerful Suction: 15,000Pa strong suction handles both wet and dry messes in one pass.
- High-Speed Motor: Equipped with a high-speed brushless motor with a rotation speed of 60,000 RPM.
- Continuous Roller Brush Cleaning: 500 scrubs per minute prevent secondary contamination.
- Triple Anti-Tangle System: Efficiently removes hair without clogging, featuring a metal comb strip and wide suction inlet.
- One-Touch Self-Cleaning: An 8-step self-cleaning process eliminates manual washing and drying of the roller brush.
- Extended Coverage: Cleans up to 180㎡ on a single charge with large capacity water tanks.
- Effortless Maneuverability: Front-wheel traction assistance and a low-center-of-gravity design for easy pushing and turning.
2. Included Components
Please check the package contents to ensure all items are present and in good condition.

Figure 2.1: Main components of the XIAOMI MIJIA Wireless Floor Washer 4C.
- Main Unit (Floor Washer Body)
- Handle Assembly
- Charging Base
- Cleaning Brush Tool
- User Manual (this document)
3. Setup and Initial Use
Follow these steps to prepare your floor washer for its first use:
3.1 Assembly
- Attach the Handle: Insert the handle assembly firmly into the designated slot on the main unit until it clicks into place.
- Place the Charging Base: Position the charging base on a flat, dry surface near a power outlet. Ensure there is enough space around it for easy access.
- Connect Power: Plug the power adapter into the charging base and then into a wall outlet.
3.2 Filling the Clean Water Tank
- Locate the clean water tank on the main unit (740mL capacity).
- Remove the tank and open its cap.
- Fill the tank with clean tap water. For enhanced sterilization, the device uses electrolyzed water, so no additional cleaning solution is typically needed unless specified by the manufacturer.
- Securely close the cap and reinsert the tank into the main unit.
3.3 Initial Charging
- Place the assembled floor washer onto the charging base.
- The indicator lights on the device will show the charging status. Ensure the device is fully charged before its first use. A full charge provides approximately 30 minutes of runtime.
4. Operating Instructions
The XIAOMI MIJIA Wireless Floor Washer 4C is designed for easy operation to clean both wet and dry messes.
4.1 Powering On/Off
- To power on, press the Power button located on the handle.
- To power off, press and hold the Power button until the device shuts down.
4.2 Cleaning Modes
The device automatically adjusts its cleaning power based on the detected mess. It can handle both wet spills and dry debris simultaneously.

Figure 4.1: The floor washer effectively cleaning various messes.
4.3 Maneuvering the Device
The floor washer features front-wheel traction assistance and a low-center-of-gravity design for effortless movement.

Figure 4.2: Front-wheel traction for easy pushing.
- Gently push the handle to engage the self-propelling feature.
- The device is designed to clean along edges, in gaps, and in corners with precision.

Figure 4.3: Cleaning along edges.

Figure 4.4: Cleaning in corners.
5. Maintenance and Care
Regular maintenance ensures optimal performance and longevity of your floor washer.
5.1 One-Touch 8-Step Self-Cleaning Process
After each use, it is recommended to initiate the self-cleaning cycle to refresh the roller brushes without manual effort.

Figure 5.1: Visual representation of the 8-step self-cleaning process.
To start the self-cleaning process:
- Place the floor washer on its charging base.
- Press the dedicated self-cleaning button (refer to your device's interface for exact button location).
- The device will perform the following steps automatically:
- Electrolyzed water preparation
- Roller brush sterilization soaking
- Base station quick-wash cleaning
- Roller brush sterilization and washing
- Soaking to loosen dirt
- Metal comb strip scrubbing
- Centrifugal water removal
- High-temperature air drying
5.2 Roller Brush Drying Modes
The device offers two drying modes for the roller brush:

Figure 5.2: Quick-Dry and Silent-Dry mode indicators.
- Quick-Dry Mode: Provides efficient drying in approximately 15 minutes.
- Silent-Dry Mode: Operates at a quiet 50dB(A) for discreet drying.
5.3 Triple Anti-Tangle System
The anti-tangle system is designed to prevent hair from wrapping around the roller brush. This system includes:

Figure 5.3: Illustration of the anti-tangle mechanism.
- Strong Detachment: A metal comb strip closely adheres to the roller, forcefully removing hair.
- Quick Suction: High-powered suction rapidly vacuums detached hair.
- Smooth Collection: A 168° V-shaped wide suction inlet with a straight airflow design ensures seamless hair disposal without clogging.

Figure 5.4: Detailed view of the anti-tangle components.
5.4 Emptying the Waste Water Tank
After each cleaning session, the waste water tank (550mL capacity) should be emptied and rinsed to prevent odors and bacterial growth.
- Locate and remove the waste water tank from the main unit.
- Carefully open the tank and dispose of the dirty water.
- Rinse the tank thoroughly with clean water.
- Ensure the tank is dry before reinserting it into the device.
6. Troubleshooting
This section addresses common issues you might encounter with your XIAOMI MIJIA Wireless Floor Washer 4C. If you experience problems not listed here, please contact customer support.
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on | Low battery; Device not properly assembled | Charge the device fully; Ensure handle is securely attached. |
| Poor suction performance | Waste water tank full; Roller brush tangled or dirty; Suction inlet blocked | Empty and clean waste water tank; Run self-cleaning cycle; Check and clear any blockages in the suction inlet. |
| Water leakage | Clean/waste water tank not properly sealed or installed | Ensure both water tanks are correctly seated and their caps are tightly closed. |
| Unpleasant odor from device | Waste water tank not emptied/cleaned; Roller brush not dried properly | Empty and thoroughly clean the waste water tank; Run the self-cleaning cycle with high-temperature drying. |
| Roller brush not spinning | Hair/debris tangled; Motor issue | Run self-cleaning cycle; Manually remove any large tangles using the cleaning brush tool. If problem persists, contact support. |
7. Specifications
Technical details for the XIAOMI MIJIA Wireless Anti-tangle Floor Washer 4C (Model D304).

Figure 7.1: XIAOMI MIJIA Wireless Floor Washer 4C.
| Feature | Detail |
|---|---|
| Brand Name | XIAOMI |
| Product Model | D304 |
| Function | Wet and Dry Vacuum Cleaner, Mopping, Blow Dry |
| Power (W) | 200W |
| Rated Power | 200W |
| Voltage | 220 V |
| Rated Voltage | 21.6V |
| Battery Type | Li-ion |
| Battery Life | <30 min (approx. 30 minutes) |
| Clean Water Tank Volume | 740mL |
| Waste Water Tank Volume | 550mL |
| Dust Box Capacity (L) | 0.5 L |
| Dust Storage Type | Aqua filter |
| Filter Type | Other |
| Installation | Hand Held |
| Cord Length (m) | Wireless |
| Weight | 6-10 kg (Net weight of main unit: 4KG) |
| Cleaning Route | Planned Type |
| Special Suction Nozzle | Efficient Brush |
| Included Components | 3 (Main unit, handle, charging base, cleaning brush) |
| Certification | CB, CE |
| Origin | Mainland China |

Figure 7.2: Real-time full-link sterilization process.

Figure 7.3: Cleaning coverage of up to 180m².
8. User Tips
To maximize your cleaning experience and maintain your XIAOMI MIJIA Wireless Floor Washer 4C, consider the following tips:
- Pre-sweep Large Debris: While the vacuum is powerful, for very large or sharp debris, a quick pre-sweep can help prevent potential blockages and extend the life of the roller brush.
- Regular Tank Maintenance: Always empty and rinse the dirty water tank immediately after use to prevent odors and bacterial buildup. Refill the clean water tank before each cleaning session.
- Utilize Self-Cleaning: Make it a habit to run the one-touch self-cleaning cycle after every significant use. This ensures the roller brush is sterilized and ready for the next cleaning.
- Choose Drying Mode Wisely: Use the Quick-Dry mode when you need the device ready soon, or the Silent-Dry mode for overnight drying without disturbance.
- Check for Hair: Despite the anti-tangle system, occasionally check the roller brush and suction inlet for any accumulated hair or debris, especially if you have pets. The included cleaning brush tool can assist with this.
- Charge Fully: Ensure the device is fully charged before starting a large cleaning task to utilize its full 30-minute runtime.
9. Warranty and Support
Warranty Information:
All products are guaranteed to be brand original and brand new. We offer a two-year official warranty for all electronic products. In case of any damage, you may send the product to the nearest repair center. Alternatively, we can send you free parts, which you can install yourself with the aid of an installation video provided by us. Please note that if damage is caused by human factors or external forces, additional repair fees may apply.
Contact Us:
If you encounter any problems with your product, such as breakage or quality issues, please do not hesitate to contact us. Send us a message, and we will reply as soon as possible, typically within 12 hours. We are committed to providing the best solution for you and ensuring a happy shopping experience. Your satisfaction is our priority.





