Brand New... In original Box OMRON Compressor Nebulizer System. This is a portable Air Elite system. The CompAir Elite is a breakthrough in compressor nebulizer technology. Current technology wastes 89% of the energy to produce the aerosol mist. The CompAir Elite's patented design vastly improves the efficiency. Very little energy is needed to nebulize your prescription medication and it takes less time too, ~ 30% less. You can add an optional battery pack to give 45 minutes of independent operation. The battery pack (not included) snaps on the bottom and will give 4 to 5 treatments before it needs to be recharged. Even though it is in a small package, the CompAir Elite is clinically proven to give the same therapeutic effectiveness as current compressor nebulizer systems. The re-usable nebulizer kit uses 2 one way valves to conserve medication. And it is designed to be tough and durable to withstand portable use. Additional convenience features: Tubeless re-usable nebulizer kit is dishwasher safe and will last approximately 6 months. AC Power supply (included) automatically switches to the appropriate voltage. Use outside North America may require plug adapter (not included) Efficient Design provides quite operation. Attractive carrying case for easy transport High output breath assist nebulizer for faster medication delivery Smallest, lightest compressor nebulizer available ? only 7 oz 100-220 volt AC adapter for world wide operationOptional battery and DC auto cable Carrying case