Hitec RCD 160240 Optic 5 2.4GHz Transmitter AFHSS 2.4GHz technology, 1024 Resolution High Precision Quad Ball Bearing Gimbals, Digital Trim with Beep Sound All Channel Servo Reversing, 5th Channel AUX Switch for Retracts or Engine Cut Elevon Mixing (Ch. 1 & 2), V-Tail Mixing (Ch. 1 & 2), ATV (Ch. 1 & 2), Trainer Function (Student Only)