The Federal Communications Commission (FCC) has reorganized the UHF television spectrum, which is also used by many wireless microphones, wireless in-ear monitors, wireless production intercom systems, and other professional wireless audio and video equipment. The spectrum between 698 and 806 MHz—known as the “700 MHz band”—has been reserved for exclusive use by Public Safety agencies and licensed wireless service providers.

The FCC has ordered that wireless microphones, in-ear monitors, and related equipment must cease operations in the 700 MHz band (698–806 MHz) after June 12, 2010, or earlier under certain conditions. This rule change does not apply to wireless systems that operate in other frequency ranges—only systems that operate on frequencies between 698 and 806 MHz are affected.

The order applies to all wireless system users regardless of whether the user holds an FCC license. The order also requires microphone users to cease operations in specified 700 MHz frequencies within 60 days upon receipt of a notice from a wireless carrier or public safety entity authorized to use the spectrum, or, alternatively, within 60 days of the release of an FCC Public Notice specifying that certain 700 MHz frequencies are no longer available for wireless system use in a particular market.