How does the mobile phone signal jammer test the e..

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How does the mobile phone signal jammer test the effective shielding distance? | #jammer

How does the mobile phone signal jammer test the effective shielding distance?

How does the mobile phone signal jammer test the effective shielding distance?

Many users feel that the shielding device is ineffective. In fact, the shielding radius is very small. In fact, many of them are caused by the wrong method of use. So how to detect the shielding range of the mobile phone signal jammer?

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