If you got the personality, loudly talking on their phones, then this gadget will be a real boon. It creates a zone of a radius of 10 meters, which completely blocked all radio frequencies, in which the mobile communications: GSM850, EGSM900, DCS1800, PCS1900, CDMA800, WCDMA/CDMA2000, PHS, DECT and even 3G. Battery life is 1.5 hours - that is enough in most cases. Price jammers - $ 246.
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