"The ML-2151N is much like the ML-7300N printer; it has the same
networking capabilities, 21 ppm, 1200DPI printing, and the option to print
on both sides of the page automatically (this is called full duplex
printing). It however builds on the ML-7300N as it brings to the table USB
2.0 support, optional wireless networking, quick toner save and full duplex
printing buttons, and a smaller, lighter, and better looking design.
Another great thing about the ML-2151N is that it supports so many
different OSes (much like the ML-7300N); the ML-2151N supports Linux,
Windows, and Macintosh computers (talk about diversity!)."