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This cell phone jammer with 4 antennas is a perfect tool for blocking such signals as CDMA, GSM, DCS, 3G and GPS. The blocking range of this jammer varies in dependence with signal strength and reaches up to 20 meters . The jammer is powered by AC adapter. This jammer can be used even while charging. This jammer is suitable for places where silent atmosphere is required, foe example, during the negotiations or any other serious meeting, also it can be used at schools and universities during exams to avoid cheating. In addition, the jammer can be used in cinemas, theaters, churches, libraries, law courts, military units, banks, hospitals, meeting rooms, etc.
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