title_body: Can the DJI fpv remote be used with a 2nd radio in a buddybox setup?
upvoted_answer: According to this thread, the answer is that the DJI FPV system doesn’t natively support BuddyBox.
  
  However, they do mention that you may be able to use an R-XSR, and feed the SBUS output of the Air Unit into the SBUS in pad to use it as a backup receiver.