Our Nebulizer has been designed to offer compact, portable and lightweight, convenience while receiving inhalation treatments. This unit requires ordinary tap or distilled water and your physician-prescribed medication to create an effective high frequency mist. Treatments can be administered discreetly thanks to advanced ultrasonic technology making your Nebulizer virtually silent during operation. The Portable Ultrasonic Nebulizer should be used under the supervision of a licensed physician and/or a respiratory therapist.For Details,please call me 86-13714562250 and my yahoo's email ID is: chinaklead