SK-2 cellular phone jammer is the most popular electronic information security instrument used in
examination halls, examination rooms, test rooms, etc. The cellular phone jammer can help
examiners to prevent students cheating with cellular phones in the examinations. SK-2 cellular
phone jammer transmits low power radio signals to block the communication signal bandwidths of
cellular phones in GSM, CDMA, PHS, DCS, etc. Beijing Signal Knight is a professional cellular
phone jammer's manufacturer in China; we can design and develop any types of cellular phone
jammers for different clients'demands. Nowadays, the cellular phone jammer has become the
necessity for schools, universities, testing centers, and so on.
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