DESC: Ultrasonic treatment allows the patient to have a deep, penetrating therapy. The silent operation, compact design and one hand use makes it ideal for traveling. Electrical requirements: 110-120 VAC/60Hz. Optional AC adapter (item# 18019) available. Treatment times are 50% less than a motor driven nebulizer. Silent operation. Comes with a closed water chamber system, timer and air flow adjuster. Comes with portable battery pack, pediatric mask, adult mask, AC adapter, nozzle, air filter and mouthpiece. Warranty: 3 Years.Method of Nebulization: Ultrasonic Vibration. Voltage Operation: 110-120V-60 HZ. Particle Size: 1.5-5.7 (MMAD - 3.8 Microns). Power Consumption 18W. Timer: 3 minutes (approximately). Nebulization Rate: 0.5 m./min.Oscillation Rate: 2.5 MHZ. Unit Dimensions: 3.2" x 6.6" x 2.3".