Cellular Phone Breaker is another jamming system with jamming range of diameter 30 to 40 meters and patch antenna gain 5dBi of each band which is specially designed to cut off wave only in the down-link band width; therefore it doesn't affect any interference to base station and repeater. Cellular Phone Breaker is controlled by an IR remote with Tx frequency range from 851/869 to 894 MHz, 925/936 to 965 MHz, 1800 to 1900MHz and 2100 to 2170 MHz.