Save money and paper when you use the HP LaserJet Auto Duplex Unit. Concentrate on more important work while two-sided pages print automatically. Experience budget savings because paper consumption is cut in half. - Conserve paper resources and budget - Supports a variety of paper types and sizes - Two-sided printing (duplexing) is done automatically with this accessory, so you can get down to business and not hover over your printer. When both sides of the page are used, there are fewer pages to manage and final documents are less cumbersome.