Everprint CHIP-OKI-B441-DR is a compatible chip-resistor for the OKI 44574307 drum cartridge. It is intended for use with the cartridge in compatible OKI printing devices.
The listed compatible models are OKI B401, OKI MB441 and OKI MB451. The stated resource is 25,000 pages. The retailer describes the chip as storing cartridge resource information and exchanging data with the printer, which lets the device track page usage.
This is a compatible Everprint replacement chip, rather than an OKI-branded cartridge.