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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