Monochrome Multifunction Laser Printer - SCX-5639FR Print Speed (Black): 37 ppm Fax Speed: 33.6 kbps Scan Resolution: up to 4,800 x 4,800 dpi Effective Resolution(Max): up to 1,200 x 1,200 dpi Print Language: PCL5e/6, PS3, XPS, Epson, IBM ProPrinter, PDF, TIFF Processer 600 MHz Fax Memory: 50 MB Memory: 256 MB (max 768 MB) Paper Capacity: 250 sheets + 50 sheets Multi-Purpose (max 820 sheets) Connectivity: Hi-Speed USB 2.0, Ethernet Gigabit Network Monthly Duty Cycle: 80,000 pages Toner Yield: 2K/ 5K/ 10K Warranty: 1 year Special Features: Scan-to-Email/FTP/SMB, Fax Forwarding to Email/Fax, PC Fax, Web-based XOA, Network File Sharing, Easy Driver Install, Document Box (1GB), First page out time as fast as 6.5s, Secure Print with Internal Flash Drive, 2GB Flash Memory Storage, 4- Line LCD, Reversing Automatic Document Feeder, Media weight 16 43 lbs paper weight OS Compatibility: Windows 2000/XP/Vista/2003/2008/7/2008 R2, Various Linux OS including RedHat Enterprise Linux, Fedora 5 13, SuSE Linux, Mandriva, Mac OS 10.4 10.6