The Samsung Printer ProXpress M3320ND , 35 PPM Mono Laser Printer, has built-in duplex printing as well as an ECO mode for increased savings on toner and paper. Operating System Windows: XP, Vista, 7, 8, 2003, 2008, 2008R2, Mac OS: X 10.5 - 10.8, Linux, Unix 128mb internal memory35 pages_per_minutemultifunction laser printerhttp://www.samsung.com/in/consumer/it/printers-multifunction/mono-laser-printer/SL-M3320ND/XIP