-Print Speed: up to 21ppm -Duty Cycle: up to 10,000 papers -Toner: W1107A -Interface: HI-Speed USB 2.0, Wireless 802.11 b/g/n -Resolution: 600x600 DPI -Memory: 64MB -Function: Only print LaserJet Manual Duplex

-Print Speed: up to 18 ppm -Duty Cycle: up to 5,000 papers -Toner: CF279A -Interface: 1 Hi-Speed USB 2.0; 1 Fast Ethernet 10/100Base-TX; 1 Wireless 802.11b/g/n -Resolution: 600x600 DPI -Memory: 128 MB -Function: 3 in 1 Black Print, copy, Scan (flatbed) LaserJet Manual Duplex