Media Contact: 
Will Wiquist, (202) 418-0509
will.wiquist@fcc.gov
For Immediate Release
FCC FINES CHINESE RETAILER $34.9 MILLION FOR 
MARKETING ILLEGAL ‘JAMMERS’
  --
WASHINGTON, May 25, 2016 – The Federal Communications Commission today issued a 
$34.9 million fine against C.T.S. Technology, a Chinese electronics manufacturer and online 
retailer, for marketing and selling signal jamming devices to U.S. consumers.  So-called 
“jammers” are radio frequency transmitters that intentionally block, jam, or interfere with 
wireless 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.
“In today’s mobile world, cellular, GPS, and other signal jamming devices seriously jeopardize 
communications, business operations, and public safety,” said Enforcement Bureau Chief Travis 
LeBlanc.  “Marketing or selling these devices to the public is unlawful and comes with
substantial penalties.”
In 2014, the company marketed jammers to U.S. consumers through its own websites and third 
party platforms.  These jammers ranged from small, concealable devices that would block cell 
phone or GPS communications for a radius of only a few yards, to high-powered jammers that 
could disrupt a wide range of communications systems for several blocks.  The company’s 
website falsely claimed that some jammers had been approved by the FCC, and advertised that 
the company could ship signal jammers to consumers in the United States.  
Following an investigation by the FCC’s Enforcement Bureau, the Commission proposed a 
$34,912,500 fine against C.T.S. Technology for its marketing of 285 jammer models in the U.S.  
The FCC also ordered the company to ensure that its marketing complied with Federal law.  
Although the company did not respond to the proposed fine, formally known as a Notice of 
Apparently Liability for Forfeiture, the company has since taken several measures that appear to 
bring its marketing into compliance with U.S. law prohibiting the marketing, sale, and import of 
signal jammers.  Because the Commission did not receive any evidence from C.T.S. Technology 
to contradict the findings in the proposed fine, today’s decision, formally a Forfeiture Order, 
affirms the full proposed fine against the company.
More information about the FCC’s jammer enforcement efforts and a list of Frequently Asked 
Questions is available at https://www.fcc.gov/jammers. 
To report the sale or use of an illegal jammer, contact the FCC through the FCC online complaint 
portal.  Additional information, including the FCC Consumer Alert on the jamming prohibitions 
and the FCC Enforcement Advisories regarding illegal signal jammers, is available at 
www.fcc.gov/jammers.
Today’s Forfeiture Order against CTS can be found here: 
https://apps.fcc.gov/edocs_public/attachmatch/FCC-16-67A1_Rcd.pdf
The Notice of Apparent Liability for Forfeiture against CTS can be found here:  
https://apps.fcc.gov/edocs_public/attachmatch/FCC-14-92A1.pdf.
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Office of Media Relations: (202) 418-0500
TTY: (888) 835-5322
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www.fcc.gov/office-media-relations
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).