I am going to join a Rc club and they recommend me to buy a buddy box. So I can fly and at the same time
my instructor can help me out if I do anything wrong. The Problem is that I don't know what to get

. I have this
Radio Transmitter
[link]http://site.nitroplanes.com/LY-Remote.jpg[/link] . The only Port it
has is this one
[link]http://img9.yfrog.com/img9/3629/p1040787b.jpg[/link].
Can anyone tell me what I need to do?
Thanks,