All our Medical Equipment have been tested to our capabilities. Our Technician team reviews every product that leaves our medical supply warehouse to reinsure that our customers are receiving an excellent condition medical unit. Our items could either be in our Los Angeles or Arizona Warehouse location.The sale of this item may be subject to regulation by the U. Food and Drug Administration and state and local regulatory agencies. Since this item does not contain medication, we are authorized to sell the nebulizer compressor system without a prescription. We do our best to describe each piece of equipment in detail to guarantee that our customers know exactly what they are purchasing. All of our Medical Equipment has been inquired from Local Hospitals closures or Trade In's. We make certain that the equipment being listed is FDA standard. However, all items must be checked by our customer before using in a professional setting.