The Lexmark MS811dn network-ready laser printer with internal 2-sided printing, an 800 MHz dual-core processor & large capacity of memory prints up to 63 ppm. It can handle any job you can throw at it with help from it's 512MB memory (which is upgradable to 2.5GB) & Dual Core 800 M Hz processor. You can increase it's paper handling capacity up to 4400 sheets which means it can suit most sizes of office environments.