Some simpler devices can only block a set of frequencies, while advanced cell phone jammers can block multiple types of networks at the same time, thereby cutting off the signal of dual-mode or triple-mode phones, and thus cannot switch between different networks. And find the open signal. Some high-end jammers can block all frequencies at the same time, while other GSM Jammer can be set to block specific frequencies.

There are many types of signal jammer equipment on the market, how should we choose? Let us find out with the editors of signal shielding equipment manufacturers:

Let's start with the function. For example, you must select the signal to be shielded. Currently there are 2G, 3G, 4G, 5G mobile phone signals, wireless signals WIFI Bluetooth signals, intercom signals UHF VHF band, remote control signals 315Mhz, 433Mhz, etc.

Choose different places from the purpose to use different models and models. If they are used in the military zone of a prison detention center, they need to be used continuously for 365 days. In this way, a shielding layer with better heat dissipation effect and more stable performance can be selected. The choices in different places are also different.

Nowadays, many schools are busy preparing for exam rooms. This is because the most important exam of the year is about to take the college entrance examination. In the face of this most important exam, many schools are actively preparing what they need to arrange the exam soup, ensuring the normal order of the exam room and meeting the basic needs of the exam room, and many schools are responding to the current situation. Ramant's electronic signal cheating method also purchased a test signal jammer as a countermeasure, but its effective range is limited, so new problems have appeared. Is it effective after shielding the wall?

Generally speaking, the area of ​​the examination room is less than 100 square meters. The installed mobile phone signal jammers are all low power. Low-power products are only used in open and small areas. Moreover, the current mobile phone signal interference technology in the examination room is very mature, only shielding the downlink, not the uplink. The power of the cell phone jammer in the examination room is divided into 12W, 16W and 18W. There are more than 30 models. The functions and functions of each model are different.