The HP Color LaserJet 4550DN Series gives exceptional color print quality with no performance (speed) trade-offs. It is backed by HPs unparalleled reputation for quality, reliability, and compatibility. This printer is ideal for all your workgroup color printing needs. Its 600-dpi engine with HP Image Resolution Enhancement technology (HP ImageREt 2400) provides 2400 dpi class color laser print quality. The automatic color calibration ensures consistent, high-quality color over the life of the printer. You get great-looking professional color documents fast - 4 ppm for full color and 16 ppm for black and white. With the optional automatic duplex unit, you get up to 8.5 by 14-inch color output on both sides of the page. Another feature is the industry-leading connectivity and manageability with optional HP JetDirect print servers and HP Web JetAdmin network printer management software.