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FCC Plans to Fine Foreign Manufacturer $34.9M for Jammer Marketing

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Released: June 19, 2014


Federal Communications Commission

News Media Information 202 / 418-0500

445 12th Street, S.W.


Washington, D.C. 20554

TTY: 1-888-835-5322

This is an unofficial announcement of Commission action. Release of the full text of a Commission order constitutes official action.

See MCI v. FCC, 515 F 2d 385 (D.C. Cir. 1974).



June 19, 2014

Mark Wigfield (202) 418-0253




Warns U.S. Consumers that Importing and/or Operating a Signal Jammer is Unlawful

Washington, D.C. – The Federal Communications Commission plans to issue the largest fine in its history

against C.T.S. Technology Co., Limited, a Chinese electronics manufacturer and online retailer, for

allegedly marketing 285 models of signal jamming devices to U.S. consumers for more than two years.

The FCC applied the maximum fine allowed to each jammer model allegedly marketed by C.T.S.,

resulting in a planned fine of $34,912,500.

“All companies, whether domestic or foreign, are banned from marketing illegal jammers in the U.S.,”

said Travis LeBlanc, Acting Chief of the Enforcement Bureau. “Signal jammers present a direct danger

to public safety, potentially blocking the communications of first responders. Operating a jammer is also

illegal, and consumers who do so face significant civil and criminal penalties.”

C.T.S. operates a website that markets consumer electronics to individuals in the United States, where it

allegedly misled U.S. consumers by falsely claiming that certain signal jammers were approved by the

FCC. In fact, the use of such devices by U.S. consumers is illegal under any circumstance. C.T.S. also

sold 10 high-powered signal jammers to undercover FCC personnel.

In addition to the planned $34,912,500 fine, the Commission is ordering C.T.S. to cease marketing illegal

signal jammers to U.S. consumers and provide information to the FCC about any persons and entities in

the United Sates that purchased its devices.

Signal jamming devices or “jammers” are radio frequency transmitters that intentionally block, jam, or

interfere with authorized communications, such as cellphone calls, GPS systems, Wi-Fi networks, and

first responder communications. It is a violation of federal law to market, sell, import, or use a signal

jammer in the United States and its territories, except in very limited circumstances involving federal law


To report the sale or use of an illegal jammer, contact the FCC Enforcement Bureau through the FCC

online complaint portal or call 1-888-CALL-FCC (or 1-888-225-5322). To voluntarily relinquish a signal

jammer, please e-mail Additional information, including the FCC Consumer Alert

on the jamming prohibitions and the FCC Enforcement Advisory to retailers regarding the marketing of

illegal signal jammers, is available at

Images of a sample of the illegal signal jamming devices allegedly marked by C.T.S. are available in the

enforcement action. The FCC enforcement action against C.T.S. is available at:

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