Item Descriptions? KONGTENBUY is A Mature Professional Inkjet & Toner Brand Delivering quliaty and cost-less remanufacturfed ink cartridges for home, office small business, large business and organisation use all over the world. Every KONGTENBUY 61XL Ink Cartridges Has Been Refurbished By a factory with a 12 step strict process, which ensures that the quality nearly meet the same standards as its OEM Ink Cartridges HP High Compatibility: DeskJet 1000 1010 1012 1050 1051 1055 1056 1510 1512 2000 2050 2510 2512 2514 2540 2541 2542 2543 2544 2646 2547 2548 2549 3000 3050 3054 3510 3511 3512 3050a 3051a 3054a 3052a 3056a 2546P 2548B 2546R Envy 4500 4501 4502 4503 4504 4505 5530 5531 5532 5534 5535 5539 OfficeJet 2620 2621 4630 4632 4634 4635 PrinterInk level not displayed:KONGTENBUY 61XL Ink Cartridges "Low ink"? "Empty" , no worries, it is normal, so please just ignore it, it can perform as good as OEM ones besides that error message.Package Included & High Yield:61XL Ink Cartridges Combo Pack in Package Remanufactured 2 ink up to 580 pages per black cartridge (based on 5% coverage on A4 sheet).