Omron MicroAir - Compact Portable Lightweight Nebulizer/Compressor is a lightweight, portable nebulizer that outperforms much larger medical compressors, providing 98% medication delivery. Compact enough to fit in the palm of your hand. Uses patented micro mesh technology to produce a dense medication fog. MicroAir runs on 2 AA batteries. Completely portable, requiring no tubes or cords, to give you unmatched convenience and ease of use.