Medical Nebulizer: Adopt oil-free pump, quiet, efficient and user-friendly. Inhaled into the lungs: Nebulizer make the mist or liquid medicine into bronchus and pulmonary alveoli. Treatment for most of the respiratory disease. Symmetry compact structure: Compact user-friendly, good radiating durable, patent-designed atomizing cup. Enjoy silence during treatment: Lower than 65db, parents choice. Enjoy silence during treatment: High quality oiless, efficient piston pump, little atomization particle and durable.