It's simple. HP colour LaserJet printing supplies with HP Smart Printing technology are designed together for HP quality, reliability and value. Years of expertise in HP LaserJet technology means HP can match leading colour imaging technology in the printer to reliable HP print cartridge technology, making professional-quality colour simple and hassle free. With HP Smart Printing technology features, HP printing supplies save you time and money. Interactive communication between the print cartridges and your printer makes automatic adjustments to optimize print quality and enhance reliability. And with HP SureSupply shopping and on-line ordering, cartridge replacement is simple and convenient. That makes HP colour LaserJet printing supplies a great value. (Using genuine HP supplies ensures availability of all HP printing features.)