The Brother HL-6180DW is the ultimate high volume monochrome laser printer solution for medium sized businesses & small workgroups. It features reliable, high-speed printing at up to 42 ppm & automatic duplex printing for producing professional two-sided documents & booklets. The HL-6180DW provides a large 550-sheet paper capacity for fewer refills, & offers low cost output via a super high-yield 12, 000-page replacement toner cartridge. Users can share the HL-6180DW with others on their network via its built-in Gigabit Ethernet or wireless 802.11 b/g/n interfaces.