Features: 0-10 Liter/min Adjustable Flow 93% +/-3% Oxygen Purity At All Flow Levels Dual Flow With Nebulizer Low Oxygen Alarm, low Noise, takes Up Less Space 24 X 7 Continous Flow Power Supply AC 220V +/-22V, 110V+/-110 V 60 Hz Operation Environment Temperature 5 Degree C-40 Degree C Inbuilt Nebulizer Atmospheric Pressure 86 kPa-106 kPa Operation regular time Cycle/Pressure rotation Transportation/ Stoage condition Temperature -20 Degree - 55 Degree C Humidity: Less than or equal to 90%