Adjustable Cell Phone Jammer for GSM/3G/4G Signals

As a cell phone jammer,this adjustable blocker can jam GSM,3G,4G frequencies so it is very appropriate to keep it in the school examination room,court,meeting room etc that need to be quiet or solemn.Besides,GPS,WIF frequencies can be configurable in the jammer www.jammer-buy.com/gsm-jammer/p-6958.html

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