Everprint CHIP-SIN-5120X is a cartridge chip for the Pantum TL-5120X black cartridge. It is listed as compatible with BP5100 and BM5100 printers, making it a replacement component for this cartridge and printer combination.
The chip communicates page-counter information to the printer. Its stated yield is about 15,000 copies, giving the printer a page-count reference for the cartridge. The listing identifies it for black printing and names the exact cartridge model, so its intended use is clearly tied to the Pantum TL-5120X system.