This is the Traxxas TQi 2.4GHz 2-Channel Radio System with an included 5-Channel Receiver. Traxxas models deserve the world's most advanced Ready-To-Race radio system. The radio system after all is the sole connection between the driver and machine. It has to be precise, comfortable, powerful, and reliable. The Traxxas 2-channel TQi radio system arrives with a full compliment of tuning features; long-range, high-output, 2.4GHz signal, and proven Traxxas reliability for rock-solid performance. It's so advanced; it doesn't even need an external antenna. However, the most important new feature may already be in your pocket. The TQi can be equipped with a Docking Base that turns your iPhone or iPod touch into a powerful tuning tool for your Traxxas model. The full-color display combines with the Traxxas Link App to deliver an intuitive, high-definition, full-color graphical user interface that unlocks the mysteries of optimizing your radio system for ultimate vehicle control.