HP LaserJet MFP M234dw - multifunction printer - B/W

A high-productivity MFP with the fastest two-sided printing in its class, an automatic feeder, and the time-saving HP Smart app. Count on peace of mind from more reliable connections, and a worry-free experience with simplified setup.
Dynamic security enabled printer
Certain HP printers are intended to work only with cartridges that have a new or reused HP chip or electronic circuitry. These printers use dynamic security measures to block cartridges using a non-HP chip or electronic circuitry. Periodic firmware updates will maintain the effectiveness of these measures and block cartridges that previously worked. Reused HP chips and electronic circuitry enable the use of reused, remanufactured, and refilled cartridges.
http://www.hp.com/learn/ds.