A "buddy box" is either another transmitter OR a dummy transmitter. You will need to provide the cable (About $15 - $20). Your transmitter will be used as the "Master" transmitter, the instructor's (or someone elses) will be used as the "Slave or Student" box.

What you will need to find out from your instructor (or who ever is teaching you) is what brand of transmitter they have. Then you will need to purchase the correct buddy box cord. Be aware that SOME of the Futaba and Tower transmitters use a rectangular/square buddy box port instead of the round port. Be sure you know what type of buddy box ports are on the master and slave AND, in some cases, the cord MAY BE SET UP with a Master end and a Slave/Student end.

Futaba, Tower and MOST Hitec transmitters are compatible with each other. If you have a transmitter that is either not compatible OR the cable for the buddy box ports is not available, you will have to provide a dummy transmitter or another transmitter AND cable for use as a slave. IF you have to go that route, I suggest getting another transmitter w/flight pack. If I remember correctly, the NexStar comes with a 4 channel transmitter. If you have to "bite the bullet", I suggest getting a 6 (or more) channel COMPUTER radio. As for the flight pack, you WILL use it. I have 8 planes (and one in the works), they all use the same transmitter, just have a flight pack in each one. Once you learn how to fly, you can sell the "Slave/Student" transmitter (or keep it as a spare) if you want to.