Output up to 55 pages per minute.First page as fast as 4.5 seconds.1 GHz dual-core processor, 512 MB standard and up to 4.5 GB memory.With new front power button and USB port, 2.4" color LCD/keypad to monitor and configure system settings and single-door access to parts and supplies, its easier than ever to get things done.ADA-compliant trays have push-button sliders and open with one hand, requiring low force and no twisting.Steel frames and a robust paper feeding system that reliably handles diverse media types and sizes support heavy-duty use and a long life in even the harshest environments.Lexmark security features help keep your information safein the document, on the device, over the network and at all points in between.With access to input capacity of up to 4,400 sheets, replacement toner cartridges that go as high as 15,000 pages, long-life imaging unit and a fuser that may never need replacement, youll spend more time printing.