Lexmark MS431dn Mono Single function Printer (PRLE29S0065) - Print Technology: Monochrome Laser, Print Speed: Black: 40 ppm (A4), Black: 42 ppm (Letter), Print Resolution: Black: 2400 IQ (2400 x 600 dpi), 600 x 600 dpi, Duplex Printing: 2-sided: Integrated Duplex, Display: 2-line All Points Addressable (APA) monochrome LCD display, Processor Speed: Dual Core, 1.0 GHz, Memory: Maximum: 256 MB, Connectivity: Gigabit Ethernet, Paper Handling: 100-Sheet Multipurpose Feeder, Integrated Duplex, 150-Sheet Output Bin, 250-Sheet Input