Lexmark Professional, Workgroup C540dw Wireless Color Laser Printer Monthly Duty Cycle: Up to 35,000 pages System Requirements:Microsoft Windows 2000, XP; 2000,2003 & 2008 server, Vista; Apple Mac OS X, OS 9.x Paper Handling: A4, A5, Executive, Folio, JIS-B5, Legal, Letter, Universal, Oficio Input Paper Capacity: 250 sheets. Output Cpacity: 100 sheets Max. Paper Size: 8.5" x 14". Print Resolution: Up to 1200 x 1200 dpi