HP MFP 137fnw Mono Laser Printer (4ZB84A) - Print Size: A4, Functions: Print, Copy, Scan&Fax, Print Speed: Up to 20ppm mono, Print Resolution: Up to 1200 x 1200 dpi, Memory: 128MB RAM, Duplex Printing: Manual, Connectivity: Wireless 802.11 b/g/n, Fast Ethernet 10 / 100Base-Tx network, Hi-Speed USB 2.0 port, Paper Handling: 150 sheet paper input tray, 40 Sheet Automatic Document Feeder