SpecificationsOverview Operating System SupportEnvironmental Specifications Print Media GuidelinesNoise Emissions Levels Media Types and SizesEmulation, Compatibility, and Connectivity CablesMIB Compatibility CertificationsOverviewEnvironmental SpecificationsNoise Emissions LevelsThe following measurements were made in accordance with ISO 7779 and reported in conformance with ISO 9296.1720 1720dnBase memory 16 MB 32 MBMaximum memory 144 MB 160 MBConnectivity ParallelUSBParallelUSB10/100BaseTx EthernetShips with print cartridge yield at approximately 5% coverage 1,500 pages 3,000 pagesDuty cycle (average) 500 pages/month 500 pages/monthDuty cycle (maximum) 25,000 pages/month 25,000 pages/monthPrinter life 120,000 pages 120,000 pagesCondition Temperature Relative humidity (non-condensing)AltitudeOperation 16 to 32°C(60 to 90°F)8 to 80% 0 to 2,500 M (8,200 feet)Storage 0 to 40°C(32 to 104°F)8 to 80%Shipping -20 to 40°C (-4 to 104°F)8 to 95% 0.25 atmospheric pressure (equivalent to10,300 M; 34,000 feet)OperatingModeBystander Emission Sound Pressure LevelLimitDeclared Sound Power Level Limit (LWAd)Printing 50 dBA 6.5 Bels