Business success requires smarter work. The HP LaserJet Pro M304a printer is designed to help you make the most effective use of your time to drive your company's growth and stay ahead of the competition. This printer is intended for use only with cartridges that contain a reused HP chip. It employs dynamic security measures to block cartridges that have a non-HP chip. Regular firmware updates maintain the effectiveness of these measures and block cartridges that previously worked. A reused HP chip allows for the use of reused, refurbished, and remanufactured cartridges.