Choose an HP LaserJet Enterprise printer designed to handle business solutions securely & efficiently, & helps conserve energy with HP EcoSmart black toner. Keep up with the demands of growing business with a printer you can rely on. This printer is intended to work only with cartridges that have a new or reused HP chip, & it uses dynamic security measures to block cartridges using a non-HP chip. Periodic firmware updates will maintain the effectiveness of these measures & block cartridges that previously worked. A reused HP chip enables the use of reused, remanufactured, & refilled cartridges. Maximum Print Speed (Black): 45 ppm; Print Resolution (Black) (Width x Height): 1200 x 1200 dpi; B&W or Color Output: B&W; Printer Type: Laser.