... action. 4.Five in one controller, owning five functions of 2.4GHZ receiver, electron speed regulator,locking type gyro,mix controller ... making your operating more convenient. 7.Standard remote control system of 2.4GHz, stable signal, strong in the interference resistance. 8. ... from Mode 1 to Mode 2,making your communication with people of the same hobby more convenient. 2.4G 4CH battle helicopter