The HL-5450DN is a monochrome laser printer with a built-in Ethernet network interface. It features reliable, fast printing at up to 40ppm and automatic duplex (two-sided) printing.Features Prints up to 40ppm Built-in Ethernet network interface Automatic duplex printing for two-sided documents Adjustable, 300-sheet capacity paper tray, expandable Mobile device printing Up to 1200 x 1200 dpi resolution Toner Save mode for less critical business documents High-yield replacement toner cartridge 64MB memory standard