YoYoInk 4 Pack Remanufactured Ink Cartridge Replacement for HP 934XL & 935XL (1 Black, 1 Cyan, 1 Magenta, 1 Yellow) for OfficeJet 6830 6230 6835 6812 LISTING INCLUDES - 4 PACK 934XL / 935XL (1 Black, 1 Cyan, 1 Magenta, 1 Yellow) - Est. Page Yield - 1000 Pages (Black), 825 Pages (Color) COMPATIBLE HP ALL-IN-ONE PRINTERS: HP OfficeJet: 6220, 6812, 6815, 6820, 6822, 6825; HP OfficeJet Pro: 6230, 6830, 6835 INK LEVEL INDICATOR - Benefit from our smart chip with ease to track ink levels in your printer to AVOID running out of ink cartridges or annoying alert messages SUPERIOR QUALITY - Resists fading, smudging and bleeding with YoyoInk Color technology to allow you to print true-to-life photos and images and laser-quality text which withstand fading for decades. Built to meet or exceed OEM specifications 2 YEAR NO HASSLE WARRANTY - 100% No Hassle Money Back Guarantee with 2 Year Warranty