Introduction
Thank you for purchasing the MIPOW Miffy Cool Mist Humidifier. This ultrasonic humidifier is designed to provide a comfortable environment by adding moisture to the air, featuring a quiet operation and a charming Miffy design with a night light function. Please read this manual carefully before use to ensure proper operation and maintenance.

Image: The MIPOW Miffy Cool Mist Humidifier and its product packaging.
Package Contents
- MIPOW Miffy Cool Mist Humidifier
- USB-C Cable
- Cotton Swab (pre-installed or spare)
Setup
- Disassemble the Humidifier: Gently remove the top cover and the Miffy figure from the water tank.
- Prepare the Cotton Swab: If not already installed, insert the cotton swab into the designated holder in the top cover. For first-time use, or after replacing, ensure the entire cotton swab is thoroughly soaked in water for 3 to 5 minutes before assembly. This is crucial for proper mist production.
- Fill the Water Tank: Fill the water tank with clean tap water. Do not exceed the maximum fill line (380ml capacity). Avoid adding essential oils or corrosive liquids, as this may damage the unit.
- Reassemble the Humidifier: Place the Miffy figure back into the water tank. Securely reattach the top cover, ensuring the cotton swab is properly seated and submerged in water.
- Connect Power: Connect the provided USB-C cable to the humidifier's USB-C port and plug the other end into a compatible USB power source (e.g., laptop, power bank, wall adapter).

Image: Diagram illustrating the humidifier's components and the assembly process, including the cotton swab and water tank.
Operating Instructions
The humidifier features a single control button for mist and night light functions.
- Mist Function:
- Press the power button once for Continuous Mist Mode.
- Press the power button a second time for Intermittent Mist Mode (3 seconds on / 3 seconds off).
- Press the power button a third time to turn off the mist function.
- Night Light Function:
- Long press the power button for 2 seconds to turn the night light on or off.
- Automatic Shut-off: The humidifier is equipped with an automatic shut-off feature for safety. It will automatically turn off when the water level is low or after 8 hours of continuous operation in spray mode to prevent dry burning and equipment damage. To continue operation, refill the water tank and restart the humidifier.

Image: The MIPOW Miffy Humidifier actively producing mist with its night light illuminated, placed on a nightstand.
Video: A tutorial demonstrating the use of the Miffy humidifier, including filling water and operating mist and light functions.
Maintenance
- Regular Cleaning: To ensure optimal performance and hygiene, regularly clean the water tank and the mist outlet. Unplug the device before cleaning. Use a soft cloth and mild detergent if necessary, then rinse thoroughly. Do not immerse the entire unit in water.
- Cotton Swab Replacement: The cotton swab is a consumable part and should be replaced every 1-3 months, or when you notice a decrease in mist output despite sufficient water and proper soaking. Ensure replacement swabs are compatible with the BTA900M model.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No mist or weak mist | Cotton swab not fully soaked; water level too low; cotton swab clogged or worn out; mist outlet blocked. | Ensure cotton swab is soaked for 3-5 minutes before first use or after replacement. Refill water tank. Replace cotton swab. Clean the mist outlet gently. |
| Night light flickers or does not turn on | Incorrect operation; temporary electrical glitch. | Ensure you are long-pressing the power button for 2 seconds. Try unplugging and re-plugging the USB-C cable. |
| Humidifier turns off unexpectedly | Water level is low; 8-hour automatic shut-off activated. | Refill the water tank. If the 8-hour timer has elapsed, simply restart the humidifier. |
| Unit gets hot at the mist spout | This indicates a potential malfunction. | Discontinue use immediately and contact customer support. |
Specifications
| Brand | MIPOW |
| Model Name | BTA900M |
| Special Features | Night Light, Quiet Operation |
| Operation Mode | Ultrasonic |
| Product Dimensions | 3.25"D x 3.27"W x 6.24"H |
| Water Tank Capacity | 380 mL |
| Input Power | DC 5V 1A |
| Input Type | USB-C |
| Noise Level | <34dB |
| Automatic Shut-off | 8 hours (mist mode) or low water level |
| Item Weight | 12.6 ounces |
Warranty and Support
MIPOW provides a one-year warranty return service for this product. For any inquiries, technical assistance, or warranty claims, please contact our professional customer service team. We offer 24-hour after-sales support to ensure your satisfaction.
Contact Information: Please refer to the product packaging or the official MIPOW website for the most up-to-date customer support contact details.



