Wolaid WD02 Piston Nebulizer works to convert the medication to a high-quality mist of fine particles that penetrates deep into the lungs. The nebulizer comes with a BPA free 2-part medicine bottle. This is a drug delivery device used to administer medication in the form of a mist inhaled into the lungs. It breaks up solutions and suspensions into small aerosol droplets, that are inhaled from the mouthpiece of the device. The nebulizer features 100% copper wire winding for a long shelf-life and motor with 3 ball bearings for smooth running . Contents: Adult mask, adult mouthpiece, medicine bottle cap with integrated baffle, medicine bottle cup, air tube, child mask.