HP LaserJet 4100 1200 1200 http://hpshopping.speedera.net/www.shopping.hp.com/shopping/pdf/4100series.pdf us-ascii A Postscript Successor of the HP LaserJet 4050, expandable with paper trays, duplex unit, network module, memory. "n" models with ethernet, "t" models with extra paper tray, "d" models with duplex unit.<br> Postscript level 3 out of the box.