HP LaserJet Enterprice 500 MFP M525DN MFP  ( Print-Scan-Copy ) Duplex , Network
A4, Print and copy speed of up to 40ppm (A4) , 42ppm (letter), 1200 dpi effective output quality , 800MHz processor, 1 GB RAM , Input:  500 & 100 sheet trays, 50 sheet ADF , Copy : up to 1000 pg , Reduce/ enlarge: 25%- 200%, Network scan/ Digital sending: Send to email, Scan color , Duplex , HP PCL6, HP PCL 5e, HP Postscript level 3 emulation, direct PDF printing. 2 Hi-Speed USB 2.0 Host; 1 Hi-Speed USB 2.0 Device; 1 Gigabit Ethernet 10/100/1000Base-TX network; 1 Foreign Interface; 1 Hardware Integration Pocket; 2 Internal USB Host , Recommended monthly volume: 2000 to 6000 pages3; Duty Cycle: Up to Up to 75,000 pages (A4/Letter) 
use : CE255A ( HP 55A )