ESTON Re-Manufactured Ink Cartridge Replacement for HP 61XL 61 XL Ink for Envy 4500 4501 4502 4504 5530 5531 5535 High Yield (Black/Color,2-Pack) Include : 1 Black CH563WN 61XL + 1 Tricolor CH564WN 61XL Remanufactured Printer Ink, Manufactured with ISO9001 Certified Type : High yield , Black - 600 pages , Tricolor - 450 pages 5% coverage of A4 paper Advantage : Show acurrate ink level when installed , Quick drying and high-resolution printouts, no damage to your printer Guarantee :1 -year limited warranty , Quality after-sales service to ensure 100% satisfied Compatible printer : Deskjet 1000, 1010, 1050, 1055, 1510, 1512, 2000, 2050, 2510, 2512 , 2514, 2540, 2541, 2542, 2543, 2544, 2545, 2549, 3000, 3050, 3051, 3052, 3054, 3055, 3510, 3511, 3512, 3515 Envy Series 4500, 4501, 4502, 4503, 4504, 4505, 4506, 4507, 4508, 4509, 5530, 5534, 5535 Officejet Series 2620, 2622, 4630, 4631, 4632, 4634, 4635, 4639 61BKXL : <span class="a-text-bold">600</span> Pages , 61CXL : <span class="a-text-bold">450</span> Pages (at 5% coverage of A4 )get up to 2x pages than standard ink cartridges 1 x 61BKXL (CH563WN) 1 x 61CXL  (CH564WN) Deskjet 1000 Deskjet 1010 Deskjet 1050 Deskjet 1055 Deskjet 1510 Deskjet 1512 Deskjet 2000 Deskjet 2050 Deskjet 2510 Deskjet 2512 Deskjet 2514 Deskjet 2540 Deskjet 2541 Deskjet 2542 Deskjet 2543 Deskjet 2544 Deskjet 2545 Deskjet 2549<br> Deskjet 3000 Deskjet 3050 Deskjet 3051 Deskjet 3052 Deskjet 3054 Deskjet 3055 Deskjet 3510 Deskjet 3511 Deskjet 3515 Envy 4500 Envy 4501 Envy 4502 Envy 4503 Envy 4504 Envy 4505 Envy 4506 printer Envy 4507 Envy 4508 Envy 4509 Envy 5530 Envy 5534 Envy 5535 printer Officejet 2620 Officejet 2622 Officejet 4630 Officejet 4631 Officejet 4632 Officejet 4634 Officejet 4635 Officejet 4639 printer Pleaseignore it and press &#034;OK&#034; button to continue printing,all our ink cartridges are filled with full ink (not quality problem) Step1: Take off the ink cartridge and reinstall it. If issue still remain, please do a several time. Step2: Clean the chip (contactor points) of ink cartridge with rubber or alcohol cotton swab. If necessary, clean also printer contactor points and do a noozle test