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WebCell Phone Use in Classrooms Can Disrupt Learning. The best of our cellphone jammer choices for classroom use is the TSJ-5G-2081 however any of our cell phone jammer current models will do the job. Feel free to Email us in order to help determine the jamming unit best for your application. (Please check your local regulations before ordering or ... WebSep 27, 2007 · The jammer is actually smaller than a cell phone, costs only $166 and shuts down GSM 850-, 900-, 1,800- and 1,900-MHz cell phone calls within a 30-foot radius. The jammer holds a... philippine carbon footprint
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