Net pole display

I have RMS 2.0 and interested in buying a net pole display (second monitor) for my customer's easy view.

My MSCE tells me that I need to buy a special hardware to have net pole display attached. Is it true?

I have contacted other dealer, and the dealer tell me RMS 2.0 have a option for second monitor and that I don't need anything else for it: Just plug and play.

I am confused.

Can someone tell me how to have NET POLE DISPLAY attached to the system? 

Thanks in advance.