A:Answer Hi Mike, great question! Yes, you can. For a 4-way application, you will require one primary switch (14291) and 3-add on the auxiliary switch (12723). If you have any further questions, please don't hesitate to respond or give us a call between the hours of 7:00 AM – 8:00 PM Central Standard Time, Monday thru Friday at 1-800-654-8483. Thank you, Jasco Products Tech Support (Manufacturer).