Includes the fusing mechanism, lower rear cover (with the two locking levers), and the rear cover / face-up output tray. Bonds the toner to the paper with heat. For 220V to 240VAC operation.Compatible Printers: HP Color LaserJet 2840 AIO, HP Color LaserJet 2820, HP Color LaserJet 2820 AIO, HP Color LaserJet 2840