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Generally, it is used in a small empty area, which is exactly the size of a classroom. However, if it is required to pass through the wall, there will be no shielding effect after passing through the wall. Therefore, if you choose a small electric power close to the signal jammer , as far as possible without going over the wall, you can configure one for each teacher, and if you choose the power, one machine can reach several classrooms. Generally speaking, there are many doubts about the purchase of these Ad Blocker In Chrome For Android Cell Phone . At this time, you can contact us to grasp the price. This is also a manufacturer with a first-class elite team for service support and many years of product development and consideration cell phone jammer work experience , has been highly praised by many customers who have cooperated with it, and it is reliable for avoiding the fraud of electronic devices in the examination room.

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