HP Color LaserJet 2550N Printer 600 x 600 dpi color and black resolution 264 MHz processor, 64 MB memory, expandable to 192 MB Manual duplexing; includes second input paper tray Parallel, USB 2.0, and 10/100Base-TX Ethernet/Fast Ethernet RJ-45 ports Up to 4 ppm color, 20 ppm black; PC and Mac compatible