Introduction of portable Medical Nebulizer The deviceis pushed by certain circuit frequency vibration to make piezoelectric ceramic vibrate harmony that caused high speed vibration of metal mesh. And the liquid will be quickly popped through micro mesh hole of metal mesh plate to be countless micro atomizing particles. This will further transfer by inhalation treatment using masks or mouthpieces to patients respiratory system. Package includes: 1 x Main unit 1 x Liquid bottle 1 x Mouth piece 1 x Adult Mask 1 x Child Mask 1 x USB charging cable 1 x Manual 1 x Quick operating guideline Notice: To prevent cross infection the nebulizer is used only by one person Please clean and disinfect nebulizer when you first using it or before and after using then dry it. Cleaning and Disinfecting: After each use first discard all residual Liquid and remove the attachment from the Main unit to clean and disinfect. Dry the parts immediately after washing. Be sure to turn off the device. Do not store when main unit Liquid and accessories have any remaining liquid or moisture. Product details: Package Dimensions : 1.7(L) x 2.1(W) x 4.7(H) Weight : 314g Nebulization Rate : 0.2mmin Working environment temperature : 1040 Power Source : AC adapter(Input:100240V 5060Hz Output: 3V5V DC 12A)