Compatible with: OfficeJet 6812, OfficeJet 6815, OfficeJet Pro 6230, OfficeJet Pro 6830, & OfficeJet Pro 6835 Page Yield: 1,000* *Average cartridge page yield in accordance with ISO IEC 24711 Shelf Life: 12-18 Months This professionally remanufactured cartridge for HP 934XL has a 'smart chip' that makes continuous adjustments to optimize print quality and enhance reliability and cost effectiveness as well as monitor ink levels Color: Black