The manufacturer has developed and manufactured a series of new generation product of the cell phone signal jammer. This cell phone signal jammer has four antennas and it is the first type of cell phone signal jammer which owns the built-in antenna, manufactured by the factory. The built-in antenna design of the cell phone signal jammer enables the jammer to be more easily and conveniently to be carried around.

And at the same time, the cell phone signal jammer is easy and convenient to be hidden without the outside antennas. This jammer does not look like the jammer but an ordinary box or something. No one would look it as the cell phone signal jammer. Therefore, the customer can use the cell phone signal jammer more conveniently in the place where the cell phone signal needs to be blocked any time with no one finding the existence of the jammer.

This cell phone signal jammer is specifically designed and produced to e used in the classroom, which is the high tech product of the jammer specific to the classroom. This cell phone signal jammer can effectively block the cell phone signals within the classroom and examination room. Among the products of the same series, this cell phone signal jammer is the best product to shield the signals, especially the 3g cell phone signal.

This cell phone signal jammer has the best shielding effect and most stable performance and parameter. These features make the cell phone signal jammer be the best type of the cell phone signal jammer among all kinds of cell phone jammers. This jammer is equipped with the cooling fan of high efficiency inside. This cooling fan is good for heat dissipation of the cell phone jammer to ensure the more effective and efficient work of the jammer. After the cell phone signal jammer starts working, the heat generated by the work of the cell phone signal jammer will be accumulating.

If there is too much heat, the valid emission power of the jammer might be decreased because of the over heat. And then the jamming range and shielding effect of the cell phone signal jammer will be affected to some extent. With the cooling fan inside the cell phone signal jammer, the cell phone signal jammer can be working more effectively and efficiently. The customer can get the better jamming range and shielding effect of the cell phone signal jammer.

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