title_body: Can I use the trainer port on a DJI Phantom 2 controller for a buddy box connection? I am trying to teach my wife how to fly drones, and as I have an old DJI Phantom 2 with two controllers, I wanted to buddy box her on it.
  
  I know there is a trainer port on both transmitters, but are they the same function as on Spektrum or other transmitters? And, if so, which switch changes it between master and slave?
upvoted_answer: I’ve done some digging to try to find you an answer.
  
  As far as I can tell, the trainer port on the back is only for use in a simulator as evidenced in links: 1, 2, 3.
  
  According the links 4, 5, there is no known way to get buddy-box functionality without modification. You could also install your own receiver and use a transmitter system that is compatible with buddy-box technology.