ProductDescriptionTheAPM590HiOxygenConcentratorhas5litercapacity,anOxygenConcentratorIndicator(OCI)andHumidiflowtechnology.Itsinnovative,modulardesignprovideshighreliabilityandeaseofservice.Theconcentratorhasfourbasicsystems--theoxygenmodule,thecircuitboard,thecompressorandHumidiflow.ProductFeatures*Fivelitercapability*Innovative,modulardesign*Durablecabinetwithintegratedhandle*Castersforeaseofmobility*Quietandlightweightdesign*Oxygenindicator*Humidiflow--eliminatestheneedforbubblehumidifier)