1. The manual vacuum cleaner is easy to install and easy to operate. 2. The petal-type breast shield design can more effectively massage the acupoints and solve the problem of milk leakage. 3. Hand-held pressure pump, easy to use. 4. Break the drawbacks of traditional manual vacuum cleaners and adopt three-speed adjustable design. 5. The patented design of anti-reverse flow isolates the milk from the outside air and prevents the secondary pollution of the milk.