Someone please help me with this powerline product

[MkivSupra]

http://www.newegg.com/app/ViewProductDesc.asp?description=33-129-218&depa=0

I need to buy 2 correct?

I want to do this


1 in my room with my cable modem, cable modem to router , and then from router to the powerline switch..

then in the next room i will need another router correct?