HP printers have the industry's strongest security because they're always on guard, continually detecting & stopping threats. With HP Sure Start, each device regularly checks its operating code & 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, & 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.