Designed to work precisely with HP LaserJet 4100 series printers for optimum output and reliability. Consistently outstanding print quality. Reliable performance and results. Easy to use and maintain with new print cartridge architecture and Smart printing technology. Smart printing technology enables supplies status and usage information, SureSupply ordering, shake-free cartridge, dynamic EP adjustments and cartridge installation assurance. Cost-effective printing solution. Backed by HP premium protection warranty.