Make sure that if you are buying the radio set to fly rc airplanes you need to make sure that any radio set you buy is for aircraft use. This is using frequincies in the 72 mhz band. there are losts of channels in this band so that more than one pilot can each have their own channel while flying so as not to interfere with each others planes. You just have to make sure that both the transmitter and reciever are on the same channel ie. channel 52. [8D]