With the OKI Microline 591, the decision is entirely yours. This letter-quality printer anticipates and conforms to all your paper-handling needs. The difference is OKISMART Paper Handling&tm;, a unique patented technology that allows the ML591 to 'read and learn' the paper you feed it, then set the head gap to the optimum distance for best print quality. It also means less time to load and reload paper stock, and can lead to longer printer life. The ML591 delivers perfect output on letterheads, card stock, forms with up to 5 parts, and labels. And, unlike ordinary printers, the ML591 takes on envelopes like any other paper media. Just feed them into the printer and they emerge flawlessly printed, with no jams or smears.