The Handy Neb Piston Compressor Nebulizer by Technoneb has a powerful and low noise level. Features: Hand Held Powerful performance Operates with a piston compressor Low noise level Contents: 1 Handyneb nebulizer 1 handy carry bag 1 adult mask 1 pediatric mask 1 PVC tubing 1 AC/DC adapter 3 filters 1 rechargeable battery pack 1 car lighter adapter 1 instructions DVD 1 instructions manual Method of nebulization lubrication free piston compressor Operating voltage 100- 240V 50 - 60 Hz Class II Power Consumption 1.1 A Maximum medication capacity 7 ml Particle dimensions (microns) less than 5 microns Nebulized solution quantity 0.25 ml / min. or more Air flow 2-3 lts/min Maximum pressure 2.3 kg/cm2 Device dimensions 123 x 86 x 48 mm Weight 771 lbs/350 grs Operating temperature and humidity 50 - 104 degrees Farenheight (10 - 40 degrees Celsius) 30 - 95 percent RH Storage temperature and humidity 13 - 140 degrees Farenheight (-25 - 60 degrees Celsius) 10 - 95 percent RH Atmospheric pressure for transport and storage 500 - 1060 mb