Omron nebulizer micro air ne u100-E: 360 degree operation, handheld, efficient medicine delivery. Silent, particle size 4.5 um, easy to clean. Very low steam is not the criteria of good or bad nebulizer. Nebulization is effective due to the particle size. Low fumes and smaller particle size ensure the medicine to reach the human body effectively. It is a compact nebulizer which is designed to be used on the go.