Color: Black - The print cartridge has a micro chip which needs to be replaced after you refill it one for each refill - Replacement chip for HP laserJet CB540A print cartridge toner refill - Compatible with HP Printer laserJet printer HP1215/1515/1518 - Yield 2200 Pages - Note: Please avoid installing this chip when there is not enough carbon powder or too much waste powder in the cartridge otherwise the chip might burn out. And you must turn off the printer first then refill the toner after that replace the chip.