Features: Brand new and high quality Compatible for HP OfficeJet 6220 6800 6812 6815 6820 6822 6825 OfficeJet Pro 6230 6830 6835 6836 printers. Package Contents: 1 x Black 934 XL, 1 x Cyan 935 XL, 1 x Magenta 935 XL, 1 x Yellow 935 XL (4 cartridges in total). Print More with XL: Up to 1,200 pages per XL Black, 825 pages per XL color cartridges (Cyan, Magenta, Yellow). Ink Level Tracking Technology: Smart Ink cartridges are equipped with smart chip that allows you to monitor current ink level and order a replacement pack in time. Easy to Install and Use: All compatible printers instantly recognize Smart Ink cartridges and work flawlessly. Specifications: Model Number: 934XL 935XL Color:Black Cyan Magenta Yellow Ink capacity:BK 58ml, C M Y 16ml With chip:Yes For use with printer： For HP Officejet 6812 e-All-in-One For HP Officejet Pro 6830 e-All-in-One For HP Officejet 6815 e-All-in-One For HP Officejet Pro 6835 e-All-in-One For HP Officejet Pro 6230 e-All-in-One Package Includes: 4PCS x Ink Cartridge note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you.