Cheating has always existed since ancient times, especially in our era of scientific and technological progress. Cheating methods are emerging in endlessly and becoming more and more sophisticated. Of course, we see more and more anti cheating work. We often see metal detectors, examiner checks, sig......
Read MoreUsually a handheld signal jammer is enough for a car or a small room application to protect an area 5 to 10 meter radius around. Cause their output power for each channel is very small such as 2mW. But some customer has a special need to enlarge the jamming area of the portable signal jammer.
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