The mobile phone itself will generate some signals, but sometimes some of the signals generated by the mobile phone will cause certain interference. Therefore, sometimes a signal jammer will be used to block the signal sent by the mobile phone. This can block signal to prevent interference caused by the signal. Nowadays, there are more and more types of models. How to choose it?
1. The appearance is not very important, just the structure of the settings is different. From the appearance, it can be divided into external antenna and internal antenna. The external antenna has an external antenna and extends outward, so it occupies a larger space than the internal antenna. Because the antenna extends outward, the external antenna The antenna effect is more stable.
2. The power of the jammer: the general power range is 3W-480W. The jammer can generally be divided into small power, medium power and high power. The power is between 3W-100W. Generally, it is not recommended to use high-power cell phone jammer. It will seriously interfere with base station signal transmission and also cause a small degree of radiation to the human body. For exams, schools, judicial exams, etc., it is recommended to recommend some medium-power machines.
3. The size of the power supply: The handheld one has a built-in lithium battery, and you can use the power adapter to charge it after the power is used up; the desktop examination room uses a 220V voltage supply, and the vehicle-mounted one generally uses a 12-36V voltage supply.
4. Place of use: If it is used indoors, it is generally suitable for examination rooms, conference rooms, offices and other spaces. The shield is low-power. Gas stations need to use explosion-proof and high-temperature resistant shields. If it is used outdoors in open areas, it needs to be used. A high-power signal jammer can achieve the appropriate distance. Especially those that have certain requirements for wall penetration.
5. Frequency requirements, that is, 2G, 3G, 4G, 5G: Before purchasing, you need to know which signals you want to block. Ordinary mobile phone signals (2345G) can be selectively blocked. If you only block 2, 3G or Only 3G and 4G are shielded, which can be adjusted before leaving the factory. There are also 2.4GWIFI, 5.8GWIFI and other frequency bands. Generally, ordinary signals can be quickly blocked.
When choosing a signal jammer, we have to carefully consider all aspects of it. Because it has a wide range of uses, the specific product to choose mainly depends on the use occasion, purpose, etc. Therefore, in order to play its role, we Think twice before choosing.