^{SKU: HP Officejet Pro K550 Color Printer (hp Office Products)}

From Deskjet 6540 or 6840: faster speeds, lower cost printing, individual ink cartridges

^{SKU: HP Officejet Pro K550dtn Color Printer (hp Office Products)}

From Officejet Pro K550 Color Printer: auto 2-sided printing, wired networking, second paper tray (350 sheets).

^{SKU: HP Officejet Pro K550dtwn Color Printer (hp Office Products)}

From Officejet Pro K550dtn Color Printer: wireless networking built-in