Introduction
Thank you for choosing the Momcozy S9 Pro Upgraded Wearable Breast Pump. This hands-free electric breast pump is designed to provide an efficient and comfortable pumping experience, allowing mothers to express milk discreetly and conveniently. With its extended battery life, LED display, and multiple modes and levels, the S9 Pro aims to optimize milk production and support your breastfeeding journey. Please read this manual thoroughly before first use to ensure proper operation, maintenance, and safety.

The Momcozy S9 Pro allows for hands-free pumping, enabling mothers to multitask while expressing milk.
Safety Information
- Always wash your hands thoroughly before handling the breast pump parts and before expressing milk.
- Ensure all parts are clean and dry before assembly and use to prevent contamination.
- Do not immerse the motor unit in water or other liquids. Clean with a damp cloth only.
- Keep the breast pump and its accessories out of reach of children.
- Do not use the pump while sleeping or overly drowsy.
- If you experience pain or discomfort during pumping, stop immediately and consult a healthcare professional.
- Use only original Momcozy accessories and replacement parts.
- Do not attempt to modify or repair the device yourself. Contact customer support for assistance.
Product Overview and Components
The Momcozy S9 Pro breast pump consists of several key components designed for efficient and comfortable milk expression. Understanding each part is crucial for proper assembly and use.

Overview of the Momcozy S9 Pro breast pump and its accessories, including the motor unit, milk collector, flanges, and charging cables.
Key Components:
- Motor Unit: The main pumping mechanism, housing the controls and battery. Features an LED display for mode and level indication.
- Milk Collector Cup: The container where expressed milk is collected.
- Flange: The part that comes into contact with the breast, available in various sizes (24mm included, with inserts for smaller sizes).
- Diaphragm: Creates the vacuum for suction.
- Duckbill Valve: Controls milk flow into the collection cup.
- USB-C Charging Cable: For recharging the pump's battery.

Detailed view highlighting the improved structure and flange edge for enhanced suction and sealing, ensuring no leaks.
Setup
- Clean and Sterilize: Before first use, disassemble all parts that come into contact with breast milk (flange, diaphragm, duckbill valve, milk collector cup). Wash them with warm soapy water and rinse thoroughly. Sterilize by boiling for 3-5 minutes or using a steam sterilizer. Allow all parts to air dry completely.
- Charge the Pump: Connect the USB-C charging cable to the motor unit and a suitable power adapter. The LED display will indicate charging status. A full charge provides approximately 270 minutes (8-9 sessions) of use.
- Assemble the Pump:
- Insert the duckbill valve firmly into the bottom of the milk collector cup.
- Place the diaphragm onto the top of the milk collector cup, ensuring a tight seal.
- Attach the flange to the milk collector cup, pressing firmly to secure.
- Align the motor unit with the assembled milk collector cup and press down until it clicks into place, ensuring a secure connection.
- Choose the Correct Flange Size: Proper flange fit is crucial for comfort and effective milk expression. Use the provided nipple measure tool to determine your correct flange size. The S9 Pro comes with a 24mm flange and includes inserts for smaller sizes if needed.
Official Momcozy S9 Pro Wearable Breast Pump Use Guide video, demonstrating assembly and basic operation.
Video guide on how to choose the right flange size for optimal pumping comfort and efficiency.
Operating Instructions
The Momcozy S9 Pro offers two distinct modes and nine adjustable suction levels to cater to individual needs and optimize milk expression.

The S9 Pro features two modes: Mixed Mode for stimulation and Expression Mode for milk flow.
- Power On: Press and hold the power button on the motor unit to turn on the pump. The LED display will light up.
- Select Mode:
- Mixed Mode: Designed to stimulate milk let-down with a faster, lighter suction pattern. Ideal for the beginning of a pumping session.
- Expression Mode: Provides a slower, stronger suction pattern for efficient milk expression once let-down has occurred.
- Adjust Suction Level: Use the '+' and '-' buttons to adjust the suction intensity. There are 9 levels available. Start with a lower level and gradually increase to a comfortable yet effective suction.
- Positioning: Place the assembled pump onto your breast, ensuring your nipple is centered in the flange tunnel. The hands-free design allows the pump to be worn inside your bra.
- Pumping Session: The pump has an auto shut-off feature after 30 minutes. You can stop the session at any time by pressing the power button.
- After Pumping: Carefully remove the pump from your breast. Detach the milk collector cup from the motor unit and pour the expressed milk into a storage bottle or bag.
Video showcasing the Momcozy S9 Pro's longer battery life and freedom of movement during pumping sessions.
Cleaning and Maintenance
Regular cleaning and proper maintenance are essential to ensure the hygiene, performance, and longevity of your Momcozy S9 Pro breast pump.
Daily Cleaning:
- Disassemble: After each use, disassemble all parts that come into contact with breast milk: flange, diaphragm, duckbill valve, and milk collector cup.
- Wash: Wash these parts immediately in warm, soapy water. Use a soft brush specifically for cleaning pump parts to reach all crevices.
- Rinse: Rinse thoroughly under cool running water.
- Air Dry: Place parts on a clean paper towel or drying rack and allow them to air dry completely. Do not use cloth towels as they may leave lint.
- Motor Unit: Wipe the motor unit with a clean, damp cloth. Do not submerge it in water.
Sterilization:
Sterilize milk-contacting parts at least once a day or as recommended by your healthcare provider.
- Boiling: Place disassembled parts in a pot of boiling water for 3-5 minutes.
- Steam Sterilizer: Use a microwave or electric steam sterilizer according to its instructions.
- Dishwasher: Some parts may be top-rack dishwasher safe (check product manual for specific guidance).
Storage:
Store clean and dry pump parts in a clean, dry place when not in use.
Replacement of Parts:
Certain parts, like duckbill valves and diaphragms, can wear out over time and affect pump performance. Replace these parts every 1-3 months, or sooner if you notice a decrease in suction or visible damage.
Troubleshooting
If you encounter issues with your Momcozy S9 Pro breast pump, refer to the following common problems and their solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| No suction or weak suction |
|
|
| Milk leaking from the pump |
|
|
| Pump not turning on |
|
|
| Pain or discomfort during pumping |
|
|
Specifications
- Model Number: S9 Pro-002
- Material: Silicone, Plastic
- Modes: 2 (Mixed Mode, Expression Mode)
- Suction Levels: 9
- Collection Capacity: Max 180ml (6oz), Optimal 120ml (4oz)
- Battery Life: Up to 270 minutes / 8-9 sessions on a full charge
- Charging Port: USB-C
- Noise Level: ≤ 50dB
- Item Weight: Approximately 2.16 pounds (for 2-pack)
- Package Dimensions: 11.02 x 6.85 x 4.21 inches
Warranty and Support
Momcozy stands behind the quality of its products. The Momcozy S9 Pro breast pump comes with a standard manufacturer's warranty. Please refer to the warranty card included in your product packaging for specific terms and conditions, including warranty period and coverage details.
Customer Support:
For any questions, technical assistance, or warranty claims, please contact Momcozy Customer Support:
- Website: Visit the official Momcozy website for FAQs, product registration, and contact information. Momcozy Official Store
- Email: Refer to your product packaging or the official website for the most current customer service email address.
- Online Resources: Explore additional resources and video tutorials on the Momcozy official channels for further guidance.
Please have your product model number (S9 Pro-002) and purchase date ready when contacting support.





