They're frequently used in theatrical productions, sporting events, and church services. Obviously, a lot of expensive hardware is going to have to be replaced. In some markets, people may have to stop using their wireless mics before the June 12 deadline. How will you know if your hardware is affected? The has a lengthy list of wireless devices that must go bye-bye.

Today's FCC order prohibits the sale, manufacture, or import of wireless microphones that use the 700 MHz band. Theoretically, wireless mics available from now on in the U.S. should operate in other frequency bands, such as channels 2-51.