Professional Signal Jammer Information Sharing

Whether you want to avoid the disturbance of incoming calls, or you want to stop people talking incessantly on their phones around you, using a cell phone blocker is an effective method of maintaining the calm you desire. It is cell phone jammer, also called cell phone blocker.

Ultra High Frequency - UHF for short refers to radio waves with frequencies from 300MHZ to 3000MHZ. It is the highest frequency commonly used in television broadcasting. UHF is widely used in short-range communications such as walkie-talkies, Bluetooth, wireless networks, mobile phones, and military aviation radios.

Cell phones are now widely used and the normal frequency and common bands include GSM, CDMA, DCS and PCS. And now with the rapid development of high technology and 3G ,4G signal are also coming into the market. And these kinds of frequency bands are widely used in countries all over the world.

Cell phone jammers in schools are becoming increasingly popular, and for good reason. Many teachers are tired of trying to stop students from texting in class and want to know how to stop cell phone use in class.

Where are you not actually required to install a cell phone signal? In fact, in prisons, it is impossible for prisoners who are serving their sentences to use mobile phones to communicate with the outside world in public places and crowded places.

In order to reasonably avoid and interfere with mobile phone related signals, such as GPS, WIFI, 2G, 3G, 4G, 5G, the mobile phone signal jammer is generated. It is mainly used in school examination rooms, prisons, detention centers, etc.

In recent years, with the development of drones, the phenomenon of black flying drones is not uncommon, and the market for drone countermeasures is also increasing year by year. So what are the current domestic UAV countermeasures? Today, the editor of dojammer will explain it to you.

As a representative function of the smartphone signal jammer system, the intelligent networking of multiple node devices and the realization of remote centralized control and management are also essential.

On February 21, foreign media Techinsight reported that a father in France used a high-power jammer to limit the cellular network in order to restrict his children from surfing the Internet late at night.

The function of the cell phone signal blocker is to block the signal, and it is used in many occasions. The most used occasions we come into contact with are school examination rooms.

The larger the jamming distance is, the better. According to the actual application scenarios and functional requirements, anti-drone The interference distance of the jamming gun is theoretically required to reach 1000 meters.

Managers can manually operate the cell phone blocking system or set up to automatically query the working status of each cell phone blocker. For faulty or damaged cell phone signal jammers, the cell phone jamming system can be found immediately, greatly reducing the daily inspection of managers. time and speed.

Earlier in the day, three Ukrainian suicide drones attacked the area where the Zaporozhye nuclear power plant is located, causing the nuclear power plant's administrative building to catch fire. Other infrastructure was not damaged, and the nuclear power plant was operating normally.

According to foreign media reports, Greece recently established an anti-drone system on important islands in the Aegean Sea, using Israeli anti-drone technology to deal with the growing threat of drones.

Faced with the harm caused by mobile phones, how do prisons block 5G mobile phone signals? Here we must mention the 5G full-band jammer in prisons. Only by establishing a truly effective prison mobile phone signal blocking system can we provide strong security for prisons and detention centers Assure.

When GPS systems become more and more popular in our daily life, GPS jammers come into play. The GPS system equipment brings us the real life and is a great help to us. The free, open and reliable nature of the GPS system has led to the development of hundreds of applications that affect every aspect of modern life.

If you want to buy high quality GPS jammer at competitive price, you can buy it from our category. When you get a better understanding of our business, you should see that the quality of our products is the best in the industry. Well, the most competitive price. Very cheap.

Whether it is in the field of daily life or in the field of traditional industrial manufacturing and control, it is faced with the networking and interconnection of massive devices. From the application point of view, the demand is fragmented, the needs of enterprises are very different, and the industrial scale development is difficult.

The principle of the cell phone jammer is: within a certain frequency range, the cell phone and the signal tower are connected by radio waves to complete the transmission of data and sound with a certain baud rate and a certain modulation method.

First of all, we need to know that when the mobile phone signal jammer is turned on, it first needs to have a 220V AC power supply, which determines that the mobile phone jammer can only be installed on the wall or the surrounding head space during the installation process.

If the low-power equipment does not use multiple antennas for long-distance shielding, but is centrally arranged or 5 antennas work together, the radiated power will be greater than 10 microwatts/square centimeter, and the short-range radiation must be seriously exceeded.

Vehicle tracking function; the actual position of the vehicle can be displayed in real time using GPS and electronic map, and can be zoomed in, zoomed out, restored, and changed at will; it can move with the target to keep the target on the screen; it can also realize multi-window , multi-vehicle, multi-screen tracking at the same time. Use this function to track and transport important vehicles and goods.

The cell phone signal jammer is to complete the signal shielding for all 2G, 3G, 4G, 5G and other standards, which determines that a standard 5G mobile phone signal jammer, the frequency range covered by the shielded signal from 700MHz to 4960MHz needs to be included.

UAV swarms can use "soft kill" methods such as electronic interference or network attacks to counteract, destroy the signal connection between the UAV swarm and the remote controller, and make the UAV swarm directly out of control and crash or return automatically.

As a professional 5G mobile phone The manufacturer of the cell phone signal jammer clearly gave the customer an answer, this is because some of the 5G frequency bands used by the current 5G mobile phones do overlap with the original 234G frequency band.

The fourth-generation drone strike gun adopts the design of a portable suitcase and has a wider range of applications. It can be quickly applied in government agencies, prisons, drug rehabilitation centers, and major competitions and conferences. The fourth-generation counter UAV equipment of Shenzhen Texin Electronics is very small, portable and easy to operate.

The signaling layer signal jammer samples the signal sent from the base station to the mobile segment through the signaling mobile phone and simulates the public network base station signal to transmit communication blocking signaling to the mobile phone by analyzing the frame code and recombining to induce the mobile communication equipment To achieve the purpose of shielding mobile communication signals.

Recently, I have often received inquiries from some customers. They want to buy a suitable wireless signal jammer from us. The purpose is also very clear, that is, it is used to block surveillance cameras. Usually, we will directly refuse to meet such needs. . So the question is, is the wireless signal blocker we produce can't block the surveillance camera?

The shielding range of the cell phone signal jammer is proportional to its own transmission power. The greater the power, the greater the shielding range. Although there are other factors that affect the effective shielding range of the mobile phone signal jammer, such as: whether the signal transmission path There are obstacles, the material and thickness of obstacles, and the strength of on-site mobile phone signals, etc.

"8 Antenna Handheld 2G 3G 4G Cell Phone and GPS Signal Jammer" is the name of the cell phone GPS jammer introduced in this paragraph, it can help people make a lot of efforts in work and life, here you can know this GPS 4G signal jammer The device is really powerful.

It's just that the shielding effect of the test cell phone signal jammer is limited in scope, generally within a radius of 0 to 50 meters, and the area is about 250 square meters. Within this range, it can be guaranteed to be blocked.

For drones that are in an illegal flying state, they need to be reversed through detection and identification technology. At present, UAV jammer systems at home and abroad mainly adopt four countermeasures.

As we all know, in the same location, different brands and even different models of the same brand have different cell phone signals. There are many willingness to affect the strength of the mobile phone, among which these points occupy the largest reason.

Among them, the shielding device of the examination room, as one of the important guarantee means to prevent information cheating, has become the standard examination room. One of the must-have equipment.

The effective shielding distance of the cell phone signal jammer is the indoor distance. There are not too many obstacles in the room, and there is a certain distance from the base station. If you use a desktop multi-antenna signal jammer indoors, the shielding effect will be better.

Do not put the hand-held mobile phone signal jammer into water or close to the fire source, and do not use the jammer in places with excessive humidity, overheating, high voltage or high radiation.

As a manufacturer of mobile phone signal blockers, we are often asked: Can we block other people's mobile phone signals through APP software? Instead of using our mobile phone signal jammer in hardware mode to achieve it. So, how do we answer and analyze this question?

In addition to the impact of the new crown virus, in recent years, smart home and DIY systems can meet monitoring applications, both of which also reduce users' dependence on security manufacturers. Analysts at Parks Associates said: "2019 was the best year for consumer security progress, but in 2020 the industry must be prepared to deal with the impact of the new coronavirus.

It can be seen that the security industry chain is very large and complex, and even leading companies cannot cover everything. If it is said that in the past, security companies fought single-handedly to gain a share of the security market, but now, this traditional tactic is outdated, and the further back, the narrower the road.

Imported devices, the design of the slow-start circuit can avoid the sparking phenomenon caused by the mechanical switch, and the working stability is good. It can cut off the GSM/CDMA/AMPS/DCS/PHS mobile phone signal within a radius of 5-50 meters, so that the mobile phone cannot make and receive calls.

The mobile phone signal jammers purchased by schools in previous years, because 5G was not launched when they were purchased, so these signal jammers can no longer be used for 5G signal shielding in the current test room signal shielding process, which makes school test room users face how The problem of upgrading or replacing the original cell phone signal jammer.

It determines the quality of the mobile phone signal, which actually includes some software and hardware aspects. The hardware part, including baseband, RF front-end, antenna, etc., affects the signal strength of the mobile phone and determines the quality of the signal, in addition to these reasons , and some software algorithms work in it.

Before the Spring Festival in 2021, a set of drone jammer system integrating detection and countermeasures was successfully tested at a railway station in Guangdong and ensured the low-altitude safety of the railway station during the Spring Festival. big effect.

Some important confidential places or key government departments choose to purchase and install a drone jammer system, the purpose is to effectively prevent illegal intrusion of drones, prevent leaks or prevent malicious attacks by drones, then drone interference defense Can the system be used continuously for a long time?

In addition, many new smart home electronic products and hobbyist electronic products use Zigbee technology operating in the 915MHz and 2.4 GHz ISM frequency bands to complete power consumption and short-range communication between devices.

To put it simply, the function of the mobile phone jammer is to send out interference signals, which seriously damage the local magnetic field, so that the signal cannot be transmitted normally, and the mobile phone cannot normally receive the signal from the base station.

When the signal jammer is working, it sends out interference signals to interfere with the channel frequency band of the base station. The interference signal increases the bit error rate of the channel and reduces the signal-to-noise ratio of the channel, so that the mobile phone cannot decode the information sent by the base station normally.

Recently, the Cyber ​​Security Bureau of the Ministry of Public Security, the Beijing Network Industry Association and the Third Research Institute of the Ministry of Public Security jointly researched and formulated the "Guidelines for the Security Protection of Personal Information on the Internet" (hereinafter referred to as the "Guidelines").

It is necessary to choose a manufacturer that specializes in information jammers or information leakage prevention equipment, and at the same time, whether it is considering better price or quality assurance, the source company should be selected first, so as to ensure that the purchase of microcomputer information leakage preventers can achieve the same effect and price. expected.

Because the prison system is different from conference rooms, theaters, examination rooms, etc., the mobile phone shielding system running in the prison requires up to 24 hours of uninterrupted operation, cell phone jammer, which requires the system to have considerable reliability.

When the phone is far away from the shielding range, it can resume normal use Portable cell phone signal jammers are imported ICs and self-developed, especially for small places at home and abroad that require special security and confidentiality, such as confidential offices, negotiation rooms, mobile vehicles, and mobile political and business circles.

The vehicle-mounted hand-held mobile phone signal jammer is a broadband transmitter with a transmission frequency of 870~880MHz, 930~960MHz, 1805~1920MHz, 2010~2145MHz, 2400~2500MHz, 2300~2370MHZ, 2555~2655MHZ (excluding GSM, DCS, PCS, 4G uplink operating frequency), is a wireless device used to cut off the signal between the transmitter (base station) and the mobile phone, which can shield the 2.4 wireless signal.

The range of GPS jammers can be from 5 to 15 meters, which can take into account the cars and buses of cars and vans, since the location tracker is generally installed in the car cab inside the car. After starting the connection according to the car's cigarette lighter, the device starts to work immediately and causes wireless communication noise (interference) in the range of 1500-1600MHz (L1/L2) within 15 meters and a half.

The shielding equipment is definitely different in the outdoor and outdoor environments. We do not recommend using the same equipment in two different environments, especially the indoor shielding equipment is used in the outdoor environment, because the outdoor is relatively complex and harsh.

In such an application scenario, the jamming distance of the handheld anti-drone jammer gun is very interesting. So what is the appropriate jamming distance?

In order to prevent the internal information from being stolen by the outside world, which leads to the occurrence of secret leakage incidents, many technical preventive measures are adopted in secret-related places, and the installation of wireless signal jammers is one of these technical preventive measures. So how does the wireless signal jammer ensure the security of information protection in classified places? Here we discuss this issue.

In recent years, the phenomenon of endangering railway safety due to the lifting and releasing of drones has occurred from time to time. Lifting and releasing drones around the railway can easily bring hidden dangers to the operation safety of high-speed railway cable facilities and high-speed railway trains.

Due to many reasons, the expert group found that the shielding systems of a large number of prisons across the country are not very effective. What's more, in order to cover up the defects of their own shielding technology to confuse the public, there has been a trend of "detection shielding" in the industry. Without the guidance of professionals, it is suggested to be wrongly guided to use "detection shielding" technology to solve the cell phone jammer needs of prisons.

The mobile phone signal jammer system is a relatively professional modern communication signal shielding technology, especially in the special environment of the prison, which puts forward higher requirements for the mobile phone signal shielding technology.

The cell phone jammer is not an unknown device, it can be used in many different places to effectively prevent cell phone leakage and eliminate cell phone noise pollution, but there are still many users who have detailed equipment knowledge and are not known , so I'll introduce it next.

Making the signal of the cell phone signal jammer stronger is a step that every user wants to operate, but many users do not understand it, so the detailed content will be introduced next, so that more users can operate it.

Before the cell phone signal jammer is installed, in order to better ensure the use efficiency and operation safety of the equipment, we need to do the pre-installation preparations, so the corresponding operations are introduced next.

The traditional way of security work in the terminal era is difficult to deal with the maintenance of unaware threats. In addition, different software will have different application intentions in different regions. Good or bad software tools can no longer be identified by a set of characteristics.

UAV interference is also a mainstream technology at present. The remote control signal of the UAV is blocked by high-power transmission, so that the UAV loses control. Generally, the UAV can be shot down directly, and the intelligent UAV can also be destroyed by an unmanned aerial vehicle. The drone interferes with GPS and Beidou signals to prevent the drone from returning.

The main function of the wireless signal blocker is to block the commonly used wireless signals of various frequency bands. The types of these wireless signals include mobile phone signals of all formats, WIFI signals, Bluetooth signals, remote control signals, wireless image transmission signals and wireless data transmission signals.

During the National Day, mobile phone signal jammers were installed on the walls of the dormitory buildings of Doumen No. 1 Middle School, and at the same time, card phones were installed in each dormitory. It seems that the school will restrict students from using mobile phones after the holiday.

The commonly used radar of phased array system belongs to the collaborative innovation technology of military weapons. For example, British Aegis ships are known for their choice of phased array system radars.

Our company is a professional manufacturer of cell phone jammers. During the production and operation process for many years, there are often some individual customers who want to consult and purchase cell phone jammers from us. Then, if the cell phone jammers are for personal use, can you directly After purchasing, are there any relevant laws and regulations that restrict the use of mobile phone shields by individuals?

The high-power mobile phone signal jammer is a new product developed by using a special advanced technology approach according to the needs of the market. It can automatically form a shielding magnetic field within a specified range, so that the mobile phone cannot be played and connected, so as to achieve the mandatory ban of mobile phones. Purpose.

The second is the direct destruction category, including the use of laser weapons, the use of drones against drones, etc. The third is monitoring, mainly by hijacking radio control and so on. The second technology is mainly used in the military field. Wufeng Technology is China Southern Power Grid's first drone jammer equipment.

It is understood that in recent years, due to the low cost, easy acquisition and simple operation of consumer drones, commercial drones have rapidly penetrated into the civilian field, the number of users has gradually increased, supervision is difficult, and they are easy to be used by criminals. to great pressure.

WiFi jammers that support radio waves and cell phones are mainly used in security installations, hospitals, schools and private schools where the use of cell phones is prohibited, as well as in banks, halls conference rooms, libraries, stores and schools prohibited. universal.

Want to know how to get rid of this powerful tracking? It won't be as easy as you hope, but it is possible. You can combine wave jammer, WiFi jammer and Bluetooth to block signal from Broadcom BCM4752 tracking chip. You must also interfere with the NFC signal. Only when all those radio signals are protected can you safely conduct this nifty hunt.

1. After the demonstration of the product, you can inspect the application, operation status and actual effect of the product in other similar projects;

2. During the inspection, it is better to bring the mobile phone into the shielded area after approval to verify the shielding effect.

We all know that drones are widely used in people's lives. So, with the advent of drones, our lives are becoming more and more transparent. But in addition, some drones are used in some areas that should not be used. Therefore, the importance of UAV jammer equipment exists in the following aspects.

When there are too many cell phone signal jammers, especially after multiple buildings in the prison area are shielded, it is difficult to turn on and off in a centralized manner; even if the power cord is arranged uniformly, a special person is required to be responsible for turning on and off on time.

The shielding range of the mobile phone signal jammer is based on the power of the jammer. If it is tested in the field, the shielding range is different according to the strength of the local environmental signal. For example, the weak shielding range of the indoor signal is large, and there are GSM base stations for outdoor use accessories. Then the GSM signal is close to the outdoor shielding range!

Band cracking method. Because the working principle of the school's cell phone jammer is to block the mobile phone by interfering with the mobile phone signal in the specified band, as long as the receiving and transmitting frequency of the mobile phone is modified, it can be prevented from being blocked.

Shielding equipment is very popular right now, and there are many different types of shielding equipment on the market. Have you heard of jammers? Maybe not. Then, this article will focus on a powerful signal jammer, 15W high power 5 antenna full signal jammer, after reading the article, you will know why it is powerful and stands out among all jammers.

Mobile phone shielding device with metal shell, it means that the body of the mobile phone shielding device is a metal material, usually an aluminum profile, and the metal material is used both as a shell and a radiator. So is this kind of metal shell mobile phone shielding instrument good?

In today's society, mobile phones have increasingly become an indispensable tool in people's work and life. People walking down the street with their phones in their hands can be seen everywhere these days.

LSS·UAV systems are readily available to anyone as a commercial product, posing an immediate threat to critical public infrastructure and military equipment. Military exclusion zone measures to keep friendly forces and critical infrastructure safe are often concentrated in areas requiring protection.

1. Use more metal utensils, which will weaken the signal but not shield it

2. Generally, thicker walls or walls made of stone also have the effect of shielding the signal.

3. The most common mirrors in the home have the function of reflecting wireless signals, but the cost is high and the risk is also great.

The conclusion we give is: If you use the same mobile phone signal jammer, when used indoors and outdoors, the effect of the two will be very different! Moreover, in these two usage environments, low-power mobile phone shielding devices are generally used indoors, and high-power mobile phone signal shielding devices must be used outdoors.

Many places need a signal shielding device, but many people do not know the installation method of the signal shielding device. Some people think that the mobile phone signal shielding device can be used directly by connecting to the power supply, but some people think that the frequency needs to be adjusted, and the signal shielding device works It's hard to tell whether or not.

It is necessary to use a Wifi blocker, on the one hand to ensure the safety of the network, on the other hand, it can control the time children use the Internet, do not indulge in the virtual world, it will cause serious damage to their body and mind. In addition, the radiation of the wifi transmitter will affect the For human health, it is not suitable to use it for a long time. You can open the wifi blocker to block the wifi signal.

When the college entrance examination and high school entrance examination are held as scheduled every year, some schools will be designated as examination rooms. During the construction of standardized examination rooms, these schools will purchase and install a large number of examination room shields. Then, a large number of examination room shields will be used in the power supply. How to solve it?

Want to cut off WiFi and bluetooth without anyone else knowing it was you that cut the signal, any good ideas would help to achieve the goal? Now the answer is of course only obtainable with a goal like a hidden mini bluetooth jammer, just here Shenzhou Mingda can provide you with a good opportunity to get a high-quality mini WiFi jammer.

There are often some customers who put forward special requirements for the use environment when consulting and purchasing our signal shielding instrument. It can be limited to a small room, outside the door or behind a wall, it must be ensured that there is no influence of the signal shielding device at all.

A customer installed a 5G jammer in a large conference room environment, and the feedback was that the effect of mobile phone shielding is indeed there, but because the conference room is too large, if only one 5G shield is installed, Certainly cannot achieve complete coverage of mobile phone shielding signals.

When using a communication signal blocking device such as a mobile phone signal shielding device, it must be reasonably compliant. According to relevant laws and regulations, if the current communication signal causes large-scale interference, it is illegal. Therefore, in order to ensure that the other two do not Delayed communication, signal shielding requirements, must be reasonably observed when using mobile phone signal shielding devices.

It is inconvenient to use with a mobile phone in places where conversations are not possible, e.g. B. in trains or restaurants. In this case I activated the jammer and sent it out of the service area. This is interesting because I usually call my phone and start shaking the lid. Today when I was reading a book on the train, people around me started shaking my phone.

They used the curiosity of candidates and parents to wait for the money before disappearing. Cell phone jammers The installation also disrupted residents around the School that protested that the school can only be opened during the day when the pupils he are in class and opening them at night prevented their normal communication.

In addition to the problem of co-channel interference, the mobile phone signal screener also has some tips to improve the quality of the wireless network at home. I hope it can be helpful to everyone. Now that most residents have deployed wireless routers in their homes, channel conflicts are inevitable. If we find instability or lag when using the network, we might as well change to a channel with fewer access points.

Some chess and card room owners even installed signal jammers in their chess and card rooms. Why? It turned out that the bosses also have a last resort. The use of signal blockers is not used to block mobile phone signals, but for those automatic mahjong machines, mainly to prevent some malicious people from using wireless remote controls to secretly control the automatic mahjong machine, thereby changing the card deal and the result of the game.

The college entrance examination mobile phone signal jammer is equipped to prevent candidates from cheating using mobile phone communication. After the mobile phone signal jammer is turned on, it will interfere with the reception and transmission of communication signals, so as to prevent candidates from using mobile devices to cheat and violate regulations.

First of all, the transmit power of the portable signal shielding device itself is fixed. That is to say, the strength of the shielded signal it emits is relatively stable, and it will not fluctuate. The error of the wall obstacle, etc., will directly affect the effective shielding distance of the shielded signal.

The cell phone signal jammer, which is often referred to as a portable mobile phone signal jammer, such as our SMa-818T5B, which uses the American Pelican military standard tow box as the installation carrier of the mobile phone signal jammer, such as The appearance structure is convenient and portable. It is very convenient and quick to drag the mobile phone signal jammer like a suitcase.

Improving the antenna system is one way to improve radio performance. Consider how a radio signal propagates: it travels in a straight line and may be blocked by buildings, hills, trees, or any other natural or man-made obstacle. To optimize and maximize range, the antenna must be as high as possible. This improves the line-of-sight of the walkie-talkie and produces a better, stronger signal. With an effective antenna system, sometimes all the user has to do is move to a higher position to maintain a strong communication connection.

The mobile phone signals in the classroom of the examination room are all remote base station signals, and are transmitted to the classroom through doors and windows. Then, the most reasonable installation location is to select the installation location of the mobile phone signal jammer in the examination room. The middle of the wall on the side of the base station, so that the shielding effect of the shielding device can be maximized.

Many customers who need to install mobile phone jammers in conference rooms mentioned that one of the biggest concerns is: how to install mobile phone jammers in conference rooms more concealed? Therefore, it is hoped that after entering the conference room, the person participating in the conference will not easily find that a signal shielding device is installed in the conference room.

The importance of drone jammers for illegal drones is obvious. At the same time, everyone knows that black drone thefts happen from time to time. Small enough to snoop, big enough to steal state and military secrets, small enough to fall and injure people which will result in airport closure.

The correct use of anti-eavesdropping detection actually depends on the different anti-eavesdropping devices, wired and wireless, and large and small. Generally speaking, wired anti-eavesdropping devices can be used in ordinary environments because there are fewer sources of interference with the device's signal and the security settings are not very good.

The mobile phone shows the phenomenon of searching the network, no signal, no service and so on. The shielding distance of the cell phone signal jammer produced by dojammer Electronics Co., Ltd. is closely related to the distance of the base station.

In the 2020s, 5G communication was widely promoted and applied, and the corresponding 5G mobile phone signal jammer device also kept pace with the times and developed synchronously with the pace of 5G. Like the signal system supported by mobile phones, the current 5G mobile phone signal blocker needs to block all 2G\3G\4G\5G signals as well as WiFi and Bluetooth at the same time.

After the mobile phone shielding device is turned on, the area covered by the shielding signal it emits usually ranges from tens of square meters to hundreds of square meters, while some high-power mobile phone shielding devices can cover thousands of square meters. , or mobile phone signals within a radius of several hundred meters will be blocked.

Destruction of the antenna: This is mainly for mobile phone jammers with external antennas. Some people who are resistant to the use of mobile phone jammers, once they see the antenna, the first thing that comes to their mind is to unscrew the antenna and throw it away. This is a relatively crude form of damage, and once the antenna is thrown away, it is very difficult to retrieve.

Some factory or workshop customers express this very concern when purchasing and using frequency jammers: Will the jammer interfere with the electrical equipment in the workshop, especially some of the precision power supplies?

The prison needs to shield the surrounding environment of the building (distance and building structure from other non-shielded buildings), so the use area, scope and floor structure of the prison need to ensure that the shielding area is very complex and special. In order to ensure the effect of the area to be shielded, while ensuring the normal calls in the shielded building and surrounding non-shielded areas.