this is a portable nebulizer that you can use for your everyday living especially if you have asthma or if you have allergic rhinitis or sinusitis this is very useful every time that you have this allergies and asthma's good for giving a fast relief and also this portable nebulizer is body of related you can put two a batteries to operate this and no need to read the manual or you have to do is to put even distilled water and it's cup and click the power button and yeah you can use it right away