The Aura Portaneb is the GOLD STANDARD in nebulization. Our Vibrating Mesh Technology is the elite form of atomization and yields extremely consistent and ultra-fast treatments. Aura’s NB40 weighs just about 5 oz yet delivers a a super powerful dose, usually in under 5 minutes!!! Ditch the compressor. In the box 1 Aura Portable Nebulizer 1 AC Power Adapter 2 AA Batteries 1 Mouthpiece 1 Adult Size Mask 1 Children Size Mask 1 Medicine Bottle 1 Mask Adapter Ring 1 User Guide 1 Carry Case Like new, used twice