HP Color Laser Jet 4600 Smart Printing supplies are designed to work precisely with HP Color Laser Jet 4600 series Printers for outstanding results. New features are integral to the printer design, creating a highly advanced printing system. Features Designed to work together with the HP Color Laser Jet 4600 series Printers for optimum output & reliability. Use 2nd generation spherical chemically-grown toner for more accurate & consistent colour print quality. enhanced pigments & gloss properties resulting in a wider colour gamut & better colour appearance. Smart printing features for intelligent supplies management including status monitoring & order facilitation. Additional graphical gauges on the control panel work with the print cartridge to further inform users when HP supplies are low or out.