Key features of the HP 1536dnf printer Type: Black and White Laser (Monochrome). Functions: Print, Copy, Scan, Fax. Speed: Up to 25-26 pages per minute. Duplex Printing: Supports automatic duplex printing (Auto-Duplex). Connectivity: Ethernet port for network, and High-Speed USB 2.0. Feeder (ADF): Includes an automatic document feeder for batch copying. Ink Used: Uses HP 78A Black LaserJet toner cartridge (CE278A). Note*: A new toner cartridge is included with the printer in addition to the one inside the printer itself. For those who are serious about buying, God willing, we will not fall short with them.