Product Warranty 3 Years For New Units Sold On Or After January 4 2011 * Exclusive Devilbiss Osd (oxygen Sensing Device) Standard On Every Unit -- Increases Accuracy And Reliability For Longer Service Intervals * Noticeably Quiet Operation * Readily Accessible Patient Controls And Protected Cannula Fitting * Two-year Dealer Service Interval * Recessed Humidifier Nook Prevents Damage * Easy To Assemble/disassemble Two-piece Cabinet For Ease Of Maintenance * Lockable Flow Meter - Pediatric Flow Meter Available * Convenient Top And Side Handles For Easy Transport * Accommodates Up To A 50-foot Cannula (15.3 Meters) * Intake Filter Features A Translucent Back To Allow Technician To Quickly Determine If The Filter Is Dirty * Alarms: High/low Pressure Low Flow Low Oxygen Power Fail Oxygen Sensing Device * Power Consumption: 310 Watts (270 Watts @ 2.5 Lpm Or Less) * Works With The Invacare Home Fill Cylinders