The Transmitter generates a radio frequency alternating current and when applied to the antenna radio waves are created. Radio Control Models can operate on many different frequencies. Hertz (Hz), Megahertz (MHz), and Gigahertz (GHz) are the measurements used to describe these frequencies. The two most commonly used frequencies in toy-grade and hobby-grade RC vehicles in the United States is a set channel within the 27MHz and 49MHz frequency ranges. These two frequencies have been allocated by the FCC for basic consumer items, like garage door openers, walkie-talkies and of course Radio Control models and toys. Unfortunately, these two frequencies are very much susceptible to interference. An example of interference comes in the form of one RC vehicle interfering with another RC vehicle both running side by side. RC vehicles using identical frequencies operating in close proximity to one another will simply interfere with each other. Or one controller may attempt to control both vehicles. In an attempt to remedy this, most RC toy manufacturers make versions of each model for both frequency ranges so that you can operate two of the same model RC’s simultaneously for racing against each other. And most manufacturers provide a label identifying the frequency range that the RC vehicle operates in.