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. Connectivity: Ethernet port for network, and high-speed USB 2.0. ADF: Includes an automatic document feeder for batch scanning. Ink Used: Uses HP 78A Black LaserJet toner cartridge (CE278A). And for those who are sincere in their purchase, God willing, we will not fall short with them.