Ms521dn Wireless PrinterMake every watt count with energy management features that reduce power consumption whether the printer is active or in sleep mode.Lower fusing temperature and automatic management of processor cores based on workload help meet rigorous ENERGY STAR 2.0 requirements.Print what you want, in the size you want with the included media tray that adjusts to paper sizes from A6 to legal, while the 100-sheet multipurpose feeder accepts smaller media and envelopes to give you even more design and output possibilities.