This set of toner cartridges is designed for use with select LaserJet Pro printers, providing reliable black printing performance. Each delivers up to 1,100 pages at standard coverage, making it suitable for regular office or home printing needs. The cartridges come pre-installed with a compatible chip, so there is no need to transfer an old chip from your. During use, you may encounter minor error messages that can be ignored or dismissed without affecting your printing tasks. The package includes two toner cartridges and a user instruction card for easy setup and use.