HP LaserJet 9050n printer high-performance, high-volume, wide-format (A3) black and white workgroup printer - Print speed black Up to 50 ppm – Processor Speed 533Mhz - Standard printer languages PCL 5e, PCL 6, PJL, PML, PostScript 3, XHTML - Maximum resolution 600 x 600 DPI - Duplex printing - Standard input capacity 1100 sheets - Standard output capacity600 sheets - Maximum ISO A-series paper size A3 Connectivity - IEEE 1284-B compliant parallel port, HP Jetdirect Fast Ethernet internal print server, 2 open EIO slots - Compatible operating systems Microsoft® Windows® 2000, XP Home, XP Professional Certified for Windows Vista™Mac OS 9, Mac OS X