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Compact Compressor Portable Nebulizer: 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, with Accessories.