HP LaserJet Pro 400 Laser Printer, M451DN: Key Features: * Print Speed Black: Up to 21 ppm; Color: Up to 21 ppm * Print Resolution Black: Up to 600 x 600 dpi; Color: Up to 600 x 600 dpi * Energy Star certified * Replacement Ink HP 305A Cyan; HP 305A Magenta; HP 305A Yellow; HP 305X Black Ink Cartridges Additional Specifications: * Paper & Media Compatibility: 50-sheet multipurpose tray, 250-sheet standard input tray, 150-sheet output tray Media Types: Paper (bond, brochure, colored, glossy, letterhead, photo, plain, pre-printed, pre-punched, recycled, rough), postcards, transparencies, labels, envelopes System Requirements: * Compatible Operating Systems: Windows XP/Vista/7, Mac OS X 10.5-10.6, Linpus Linux (9.4, 9.5), Red Hat Enterprise Linux 5.0 (supported with a pre-built package); SUSE Linux (10.3, 11.0, 11, 11.1, 11.2), Fedora (9, 9.0, 10, 10.0, 11.0, 11, 12, 12.0), Ubuntu (8.04, 8.04.1, 8.04.2, 8.10, 9.04, 9.10, 10.04), Debian (5.0, 5.0.1, 5.0.2, 5.0.3) (supported by the automatic installer); HPUX 11 and Solaris 8/9 What"s Included: * Quick Reference * User"s Guide * Installation CD-ROMs * Power supply * Power cord * Black, yellow, magenta, cyan ink cartridges * USB cable not included. To shop for a USB printer cable, click here ENERGY STAR® Products that are ENERGY STAR-qualified prevent greenhouse gas emissions by meeting strict energy efficiency guidelines set by the U.S. Environmental Protection Agency and the U.S. Department of Energy. The ENERGY STAR name and marks are registered marks owned by the U.S. government, as part of their energy efficiency and environmental activities.