Best Cell Phone Number Blocker
Most schools use the test room type Best Cell Phone Number Blocker suitable for long hours of work and good quality. Second, how big are we in the shielded area? For example, a room of 100 square meters is still a site of several thousand square meters. If the area is large, the power must be large, and if the area is small, the use of adjustable shielding power must be considered. Then there are the frequency bands that need to be blocked. Are China Mobile, China Unicom, Telecom, and CDMA all blocked? Still only need to block some frequency bands. Check whether there are obstacles between the cell phone jammer and the wireless communication device. The interference signal sent by cell phone jammer will be attenuated to different degrees after passing through the obstacles, please try to prevent it. The indoor jammer 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 mobile phone jammer. The farther the cell phone signal jammer is from the base station, the stronger the theoretical shielding effect of the cell phone jammer will be.
Why do cell phone signal jammers interfere with the normal use of cell phones? Cell phones work by sending and receiving radio waves. The frequency of the mobile phone is about 1.8GHz. To interfere with cell phone signals, you need a device that emits radio waves of the same frequency. Best Cell Phone Number Blocker It is such a device that shields the mobile phone signal within the range, and the strength of the light has a serious impact on the quality of calls and Internet access. Typically, cell phone jammers are strongly jammed within 25 meters. The effective range of 25 meters is also less affected. The range of cell phone jammers also depends on the specific performance and power of each jammer. In today's flood of media, the influence of developed telecommunication networks is influenced by Gong's use of Weibo, not only in university classrooms such as conferences, but also in the reunion sequence of various daily social activities... In the classroom, teachers and students must agree , the order cannot be revoked, and it is obviously illegal for students to play with mobile phones.