In order to ensure the fairness and justice of the examination and protect the vital interests of the majority of candidates, cell phone shield is used in the college entrance examination room. Like other important examinations, the use of mobile phone shielding in the examination room has also attracted much attention. The misunderstanding in use must be paid attention to.

(1) In different applications, the equipment will have different effective shielding ranges. This problem is closely related to the field strength on site. Different types of mobile phones may not have the same shielding range in the same place, so it should be determined according to the actual situation.

(2) The factors affecting the interference range include but are not limited to: distance, direction, barrier free objects opposite to the base station, wall materials of site buildings, installation height and installation specification of Signal Jammer, and other factors shall be paid attention to.

(3) Generally, the installation height of signal jammer is 1.8 to 2.5m, and the installation position shall be unobstructed between the target shielding area and the target shielding area. If the antenna is to be vertically installed on the wall mounted, the antenna can be folded 90 degrees and vertically upward.

(4) It is normal for the shielding of cell phone shield to operate for a long time, and the surface temperature can rise to more than 40 degrees