HP +Referral+ CHP310 is compatible in the following HP Models:

HP Photosmart 2570 All-in-One Printer series

HP PHOTOSMART 2571 ALL-IN-ONE PRINTER - Q7218C
HP PHOTOSMART 2574 ALL-IN-ONE PRINTER - Q7220B

HP LaserJet 8000 Multifunction Printers series

HP LASERJET 8000 MULTIFUNCTION PRINTER BUNDLE - C7092B
HP LASERJET 8100 MULTIFUNCTION PRINTER - C8065A

HP LaserJet 4000 Printer series

HP LASERJET 4050 USB-MAC PRINTER - C7829B

HP LaserJet 4 Printer series

HP LaserJet 4p/mp Printer - C3134A

HP LaserJet 1000 Printer series

HP LASERJET 1022N XI PRINTER - CB431A

HP Deskwriter Printer series

HP DESKWRITER C - C2630A

HP Deskjet 900 Printer series

HP DESKJET 934C PRINTER - C6427M
HP DESKJET 955C PRINTER - C6429E
HP DESKJET 957C PRINTER - C6428D
HP DESKJET 957C PRINTER - C6429F

HP Deskjet 600 Printer series

HP DESKJET 640U PRINTER - C6508A

HP Deskjet 500 Printer series

HP DESKJET 500J PRINTER - C2603A

HP Deskjet 300 Printer series

HP DESKJET 300J PRINTER - C2613A

HP 2000c/2000cxi Printer series

HP 2000CN PRINTER - C5901B