"This compact hand held design is lightweight and simple to operate. Weighs only 20 oz w/ battery. The compact nebulizer gives quick treatments, with a particulate size of 3.0 to 4.0 microns. Safe, convenient, and easy to use. Comes with: carrying case, two face masks (adult and pediatric), three power sources (ac power adapter, 12 VDC power adapter, and re-chargeable battery), and replacement filters.Offering Freedom While Maintaining a Consistent Medication RegimentThis Is New Design With Lip On Battery So Can Only Be Put On In One Direction To Avoid Burning Out Battery Portable Nebulizer Compressor, Weights 20Oz, With Particulate Size Of 3.0 To 4.0 Microns. Comes With Carry Case, Two Face Masks (Adult And Pediatric), Three Power Sources (Ac Power, 12Vdc Power Adapter, And Re-Chargeable Battery) And Replacement Filters. This Compact Hand Help Design Is Lightweight And Simple To Operate. Weighs Only 20 Ounces With The Battery. This Compact Neb Gives Quick Treatments With A Particulate Size Of 3.0 To 4.0 Microns. This Comes Complete With A Carry Case,Two Face Masks (Adult & Pediatric) Three Poser Sources(Ac Power Adaptor,12Vdc Power Adaptor,And Re-Chargable Battery) And Replacement Filters. 14.5Psi, 2.5Liter Minimum Volume. Low Pressure 22.475 Mg. High Pressure 27.26 Mg. 5 Yr Warranty On Nebulizer, 6 Month Warranty On Battery." Case Pack 3