perhaps you need a signal jammer back bling

Whether there is any obstruction between the cell phone jammer and the wireless communication equipment. The interference signal emitted by the jammer will be attenuated to different degrees after passing through the obstruction, please try to prevent it.Indoor-type shielding device is recommended to be placed at a height of about 180cm-220cm from the ground, and the angle is preferably forward.The weaker the wireless communication signal strength in the use environment, the stronger the theoretical shielding effect of the shield. The farther the shielding environment is from the base station, the stronger the theoretical shielding effect of the shielding device.

In the exam season each year, all parties begin to prepare for the exam. The invigilator has various tricks to prevent high-tech cheating. Among them, the special shielding device for the exam room is still an anti-jamming device. However, Foshan Shangkino, as a well-known manufacturer of signal jammer, reminds that there are many types of jammers, and the user should clarify his needs before purchasing, so as to avoid poor shielding effects and accidents in the examination room, and pay attention to the method of use. Correctness.

It is recommended to place the indoor shielding device at a height of about 180cm-220cm above the ground, with a forward angle.The interference signal emitted by the Signal Jammer Back Bling will be attenuated to different degrees after passing through the obstruction, please try to avoid it.The weaker the wireless communication signal strength in the use environment, the stronger the theoretical shielding effect of the jammer.The farther the jammer application environment is from the base station, the stronger the theoretical shielding effect of the jammer.