The Everprint CHIP-HP-M252-B-A is a compatible cartridge chip for the HP CF400A black cartridge. It is intended for cartridge replacement or remanufacturing, where the chip helps the printer recognize the cartridge and track its printed-page count.
The listing specifies a 1,500-page yield and compatibility with HP LaserJet Pro M252 (201A) and MFP M277 devices. Its black designation matches the CF400A cartridge variant, making this chip a replacement component for that cartridge family.