This jammer is specially used in all kind of vehicles where the driver/operator should not be disturbed by phone calls.
Single
ModelNumber:MGT- P3R This device is a single band jammer (GSM900) same as MGT-P3 ...
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ModelNumber:MGT- P5R This jammer is same as the P3 and P4 above but covers 3 frequency bands (GSM900 / GSM1800 / 3G) and has adjustable range. ...
Come From MAGNUM TELECOM