HP printers have the industry’s strongest security because they’re always on guard, continually detecting and stopping threats. With HP Sure Start, each device regularly checks its operating code and repairs itself from attempted hacks. Whitelisting checks firmware during startup to help ensure that it’s authentic, good code—digitally signed by HP. Easy-to-use features, fast print speeds, and simple mobile printing options help you keep up with the speed of business. Maximum Print Speed (Black): 35 ppm; Maximum Print Speed (Color): 35 ppm; Print Resolution (Black) (Width x Height): 1200 x 1200 dpi; Print Resolution (Color) (Width x Height): 1200 x 1200 dpi.Package Includes: (4) Preinstalled HP LaserJet Toner Cartridges; Toner Collection Unit; In-Box Documentation; Power CordNote: This is a non-returnable item.