Signal Jammer classroom-how to choose a signal jammer

Focus on the security field for 13 years, let the professionals help you choose a professional signal jammer.

Customized solutions to solve these problems for you

Afraid of incomplete shielding? The signal environment is complicated, afraid of not having enough budget? Afraid of being destroyed, the machine life is short? Just want to shield one signal, afraid of affecting other frequency bands? Afraid of being discovered by others after installing a jammer? Afraid that the jammer is too ugly to affect the indoor environment?

The mobile phone signal jammer is produced to reasonably avoid and interfere with mobile phone-related signals, such as GPS, WIFI, 2G, 3G, 4G, or 5G in the future. It is mainly used in school examination rooms, prisons, detention centers, etc., in order to ensure fairness and justice in examinations, high school entrance examinations, college entrance examinations, or usual mock exams.

So how to choose a signal jammer? From the manufacturer's point of view, if the choice is not appropriate, it is easy to cause the product to be returned or replaced, or the installation has no effect. How to choose shielding device Greetwin Tech five steps teach you?

First, the appearance is not particularly important compared to the shield, but the structure of the installation is different. From the appearance, the shield can be divided into an external antenna and an internal antenna. The external antenna has an external antenna and stretches out, so it occupies a larger space than the built-in antenna; it is because of the extended antenna. , The effect of an external antenna is more stable.

Second, the power of the shielding device: the general power range is 3W-480W, and the shielding device can generally be divided into low power, medium power, and high power. The power is between 3W-100W. Generally, it is not recommended to use high-power signal shielding. , It will seriously interfere with the signal transmission of the base station, and also have a certain degree of radiation to the human body. For exams, schools, judicial exams, etc., it is recommended to recommend some medium-powered machines.

Third, the size of the power supply: the handheld is a built-in lithium battery, you can use the power adapter to charge after the power is exhausted; the desktop examination room uses 220V voltage power supply, and the car-mounted vehicle generally uses 12-36V voltage power supply.

Fourth, the place of use: If it is used in an indoor place, the shielding device that is generally suitable for examination rooms, conference rooms, offices, and other spaces can be low-power, and the gas station needs to use explosion-proof and high-temperature resistant; if it is an outdoor open area, it needs to Use high-power signal jammers to reach the appropriate distance. Especially there are certain requirements for wall penetration.

Fifth, the frequency requirements, which is what everyone knows, 2G, 3G, and 4G: Before buying, you need to know which signals you want to block. Ordinary mobile phone signals (2G 3G 4G) can be selectively blocked, if you only block 2G 3G or only shielding 3G 4G, this can be adjusted before leaving the factory, and there are also 2.4GWIFI 5.8GWIFI and other frequency bands. Normal signals can be shielded quickly.

ShenzhenGreetwin Tech Co., Ltd., a manufacturer of signal jammers for 12 years, has insights into the principle of signal jammers/cracking methods and how to install jammers. It provides mobile phone jammers for school examination rooms and prisons. GPS signal jammers.Wireless wifi mobile phone signal shielding one-stop signal shielding solution!!

Want to know what kind of jammer is suitable for you? Please contact Yvonne

WhatsApp：+8618711216106

Skype：Sales06@greetwin.com