Traxxas 1/10 Slash 2WD TQ 2-Ch RADIO & RECEIVER 2.4GHz Transmitter 6516/6519 4x4 Traxxas TQ 2.4GHz 2-Channel Transmitter (Part # 6516) . Steering Trim Adjustment Dial . Compatible only with the Traxxas 6519 Receiver . Traxxas TQ 2.4GHz 3-Channel Micro Receiver (Part # 6519) . Dimensions: 1.05x1.5x0.43" (26.9x38x11mm) . Weight: 0.35oz (10g) . Requires Four (4) AA Batteries NOT INCLUDED .