Air BusPediatric Nebulizer. Lighthearted design to appeal to children without any loss of efficiency or dependability. Powerful piston pump, closed water chamber system, timer and airflow adjuster combine to make this a reliable system for your child. "Adaptive Dose Therapy" system adjusts aerosol delivery. Features: Designed with graphics to appeal to children Powerful piston pump is efficient, dependable and quiet The "Adaptive Dose Therapy" allows for the adjustment of the aerosol delivery Comes with a closed water chamber system, timer and air flow adjuster Pediatric mask, adult mask, tubing, filter and mouthpiece are included Warranty: 3 years