The smallest GPS anti-tracking jammer. Effectively disturb the GPS tracking signal around to avoid being tracked. This video will show you how to use this device
                            
                        Is it acceptable to use mobile signal blockerss in schools?
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                Since smartphones have become popular, more and more students turn their attention to mobile phones. Students who use their mobile phone for social activities can be found everywhere in the classroom. So, I wonder if schools can use jammers to stop this phenomenon?
            
 
                Hello alexy!
                Given your situation, the jammer that suits you needs to meet the following two points:
                1. Can blocker GSM / CDMA, 3G, 4G and other cell phone signals
                2. At least jammer range 15-20 meters, to ensure that cover the entire area of the classroom
                You can choose the jammer according to the above criteria. Hopefully my answer is of help to you
            
            
            
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