This is a covert military tactical jammer. It's very portable, and the jamming range is very large. This video will show you this product
How to protect your privacy with a signal blocker
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Audio recording pen can help us recording some work, learning or something of the life that can bring some convenience to us. That is the reason why it so popular in life. But when we talk with others, you may talk about some content or learn is privacy, so you won’t want somebody is recording them by the audio recording pen. Now more and more audio recording pen in the market, there are various kinds and different size, the smallest is the same as a pen. If someone insist on recording even you combat him, he also can do that we can’t realize. How can I do in this situation.
Second floor
We have nothing against people who use their usual mobile phones, if they speak in a normal tone and do not scream loudly, but this damn continuous beep is as annoying as being bitten by mosquitoes and listen to the other end of the conversation that is usually returned (REAL LOUD is simply unbearable
In Perfectjammer.com have a great desktop model of cell phone jammer for schools which you can use in your classroom
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