Businesses, organizations and churches using wireless microphones operating in the 700 MHz band must stop using them no later than June 12.
Both licensed and unlicensed users must comply or face fines, according to the Federal Communications Commission. The new rule affects only wireless microphones and similar devices operating between 698 MHz and 806 MHz. Systems operating at other frequencies are not affected.
Users may find the spectrum in which their equipment operates by checking a label on the device. A list of affected microphones and other information about the rule is online at www.fcc.gov/cgb/wirelessmicrophones. Information is also available by calling (888) 225-5322 (CALL-FCC) or faxing (866) 418-0232.