Print Speed (Black): 45 ppm,Print Language: PostScript 3, PCL6, IBM ProPrinter, EPSON. Processer 600 MHz Dual Core. Paper Capacity: 520-sheet Cassette,100-sheet MultiPurpose Tray. Paper Type: A4, A5, Letter, Legal, Executive, Folio, Oficio, ISO JIS B5, Envelopes.Connectivity: USB 2.0, 10/100 Base TX Ethernet. Monthly Duty Cycle: 150,000 pages. Toner Yield: Standard - 7K; High Yield - 15K. Warranty: 1 year. Special Features: Built in Network and Duplex, Lower CPP due to 2-piece Cartridge. OS Compatibility: Windows 7/98/Me/NY4.0/2000/XP(32/64bits)/Vista/2003 Server (32/64bits), Various Linux OS Including Red Hat 8 9, Fedora Core 1 4, Mandrake 9.2 10.1 and SuSE 8.2 9.2, Mac OS 8.6 9.2/10.1 10.4.