Description The network-ready Lexmark M1145 laser printer features internal two-sided printing, an 800 MHz dual-core processor, 256 MB standard memory and a 350-sheet standard input for achieve a print speed of 42ppm. FEATURES: monochrome laser Duplex Printing: Integrated Duplex Print Speed: Up to 42 pages per minute Recommended monthly page volume: 1500 - 14000 pages Printing technology - monochrome laser Workgroup size - Medium Workgroup Screen - 2.4 inch (60 mm) color LCD screen Dimensions of media accepted - A6, Oficio, 7 3/4 Envelope, 9 Envelope, JIS-B5, A4, Legal, A5, Letter, Statement, Executive, Universal, DL Envelope, Folio, 10 Envelope Paper handling included - 100-Sheet Multipurpose Feeder, Integrated Duplex, 150-Sheet Stacker, 250-Sheet Integrated Tray Port connectivity - Gigabit Ethernet (10/100/1000), Hi-Speed ??Certified USB 2.0 Specification (Type B)