Everprint CHIP-OKI-C822-Y-DR is a yellow chip for an Oki drum cartridge. It is listed for use with the Oki C822, C831 and C841 printers, supporting cartridge identification and reuse after refilling.
The chip stores cartridge status information, including the printed-page count and toner-use level. When the cartridge reaches its recorded limit, replacing the chip can allow the refilled cartridge to be used again.
The listed print yield is 30,000 pages. This is a replacement chip for the drum cartridge, not a complete cartridge.