Upon activation, the Amazon Dash Replenishment service measures the toner level and automatically orders toner from Amazon when low. This ensures that you never run out again.</br>Prints up to 40ppm</br>Built-in Ethernet network interface</br>Automatic duplex (two-sided) printing</br>High-yield replacement toner cartridge available*</br></br>Product Description</br></br>The HL-5450DN is a monochrome laser printer with a built-in Ethernet network interface.  Ideal for offices or small workgroups, it features reliable, fast printing at up to 40ppm and automatic duplex (two-sided) printing. Plus, it provides flexible paper handling via its 300-sheet paper capacity, and uses a high-yield 8,000-page replacement toner cartridge* to help lower running costs.</br><br/>http://www.amazon.com/gp/product/B008CJ1MTE