HP LaserJet 2420dn Monochrome Printer Up to 30 ppm print speed; 1,200 x 1,200 dpi resolution 64 MB memory, expandable to 320 MB, 2 open Compact Flash slots Parallel and USB 2.0 interfaces, EIO slot HP Jetdirect Fast Ethernet embedded print server 100-sheet multipurpose tray, 250-sheet input tray; automatic two-sided printing