The GPS signal jammer mainly releases radio interference that can disable the GPS locator within the specified electromagnetic waveband and create the same electromagnetic environment as the device to block the signal. Currently, it is mainly used to shield GPS satellite signals so that no data can be uploaded to the platform, so that the device cannot be used normally offline.
In theory, the GPS signal is shielded (the current jammer can be shielded along with the LBS signal) and the car dealer cannot find the vehicle information. The prerequisite, of course, is that the GPS jammer must be constantly powered or that the GPS tracking device is removed, otherwise the car dealer can still position it.

The cell phone signal jammer scans from the lower frequency of the forward channel to the upper end at a certain speed during operation. This scanning speed may cause garbled interference with the message signal received from the cellular phone, and the cellular phone cannot recognize the normal data sent by the base station, so that the cellular phone cannot connect to the base station. The mobile phone manifests itself as the phenomenon of searching the network, the mobile phone with no signal, no service system, etc.
To prevent students from using cell phones, schools usually use jammers to cheat. For security and management reasons, prisons can also use high-performance jammers to prohibit prisoners from communicating with the outside world and to reduce threats to the prison. When used correctly, mobile wireless jammer are definitely an advantage. Regardless of the environment, those who keep talking on the phone may be able to remain silent. Interference transmits high-power signals at the same frequency as the cell phone, causing the two signals to collide and cancel each other out. This is the basic working principle of any jammer. Simple devices only block one set of frequencies. High-end devices can block all frequencies at the same time. Cell phones are full duplex devices, meaning they use two different frequencies. One listens, the other speaks. Some basic jammers can only block one of these frequencies. Advanced jammers not only interfere with all cell phone signals, but also many other signals. It also has a unique frequency switch that can be selected based on your needs.
Generally, for general exams and small meetings, choosing a 2W-10W cell phone signal jammer will achieve good results. However, according to our investigation of major schools and important meeting places, many places are often one-sided pursuit of high-power jammers. For example, a school with more than 20 classrooms installs a jammer in each classroom and selects them. It has a 30W transmission power, and after the test, due to inadequate use, a small number of shielding devices are not closed in time, and the transmission continues for several weeks.
The frequency jammer transmits interference signals through broadband to interfere with the mobile phone signals. It is a signal emission source in itself. There is radiation in nature. The current use needs, its transmission power ranges from 1W-480W, you can make a comparison, the maximum transmission power of GSM mobile phones is 2W, and the usual transmission power of GSM macro base stations is between 20W-40W. The transmission power of the shielding device generally used for examinations and meetings is between 10W-60W.

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.
Most schools use test room-type mobile phone GSM jammer that are suitable for long-term work and are durable. The second is how large are we in the shielded area? For example, if it is a room of 100 square meters or a venue of thousands of square meters, if the area is large, the power must be larger, and if the area is small, consider choosing the shielding power adjustable. Then there is which frequency bands need to be shielded. Are China Mobile, China Unicom, Telecom and CDMA all shielding? Still only need to shield part of the frequency band.
In order to live a healthy and comfortable life, we need to take steps to avoid more noise. We must admit that mobile phones have gained a lot of convenience in our daily lives. However, people’s privacy is now threatened by high-tech mobile phones. In order to create a safe and peaceful environment conducive to life, cell phone signal jammer will be of great help. As you can see, this 4G mobile phone jammer adopts a compact and portable outline design and will get a beautiful appearance when used. With this compact and exquisite design, you can take it with you and use it at any time. It brings you a convenient and quiet life. The 3G 4G mobile phone signal jammer has a compact and portable design, and has the strong blocking ability of the CDMA GSM DCS PCS 3G 4G signal frequency band, which depends on the length of the mobile phone signal in a 15m radius. You can easily block cell phone signals from CDMA GSM DCS PCS 3G and 4G. Moreover, you can protect yourself from being tracked by others and protect your privacy more easily.

Do you want a 3G 4G cell phone signal portable jammer that can help you avoid all kinds of troubles? As we all know, with the development of mobile phone technology in the information age, people's lives are getting busier. Sometimes we just want to have fun in a quiet environment. For a quiet and healthy daily life, you may need No. 3, 4G, portable and adjustable cell phone signal jammer, if you really want to buy it, it will bring us comfort and health.
Can you imagine that the students visiting the museum are the most important stage in their lives, but don't know why they are here? Looking around the knowledge and beauty of the museum, they can understand the meaning of all this well. A long history, magnificent art and knowledge of the ocean can make someone fall in love. Everything is harmonious. Suddenly, the annoying guy took out his mobile phone and shouted, no matter how others feel, what would happen to stop? Fight with him? If a frequency jammer is installed there, there is no good choice here. no problem. This is a world of interference. Place the kit now!
Every signal jammer on the market has an advantage, but for most signal jammers on the market, they are designed as an external antenna and after connecting the antenna can be used to easily find that signal jammer when in use. And now there are some people who want to use the hidden style signal jammers.
Not all people want to prevent cell phone signal, it is now necessary to cut off the signals, such as GPS, WiFi or some other type of signal band or the like using the blocked hidden signal, and indeed such a hidden signal jammer has been invented a. Something that looks like a picture and some hidden signal interference style design looks like a radar.
Nowadays intelligent house systems are more and more in demand. Devices connected to the Internet, called the Internet of Things, are ubiquitous. With such a state of affairs all of the connected household goods can become eyes and ears in your own home, which as exposing your privacy with the government. In this case only jammers will solve the situation in advance.
When people hear or read about cell phone portable jammer or other types of signal jamming devices for the first time, they usually don't know much or even know nothing about them. But for anyone who is really conscious and absolutely right decision to buy one type of disturber or the other perfectly to make the goal of that person fit and wants to achieve with the help of the jammer he or she wants to buy, there are a lot of various information that must be learned.
The information needed by anyone to purchase the confident jammer is not only the common information about the use of signal shielding in different places and their purpose, but also very important technical data for the person to be able to easily understand how to be each type of Signal jammers works and what are the main differences between the different types of signal jammers. Usually this type of information is very difficult to find, and for anyone there is a lot of time needed to be spent discovering everything and learning all aspects of the working principles of signal shielding.
Global satellite navigation, GPS or GNSS as a real-time positioning system, plays a major role in everyone's everyday life, for example when using a navigation system to get from A to B. GNSS is also often used by critical infrastructures such as cellular or power networks or in the financial sector in order to determine not only the positions but also the current time with high precision.
GNSS signals have a relatively low signal strength on earth, which is why it is relatively easy for cyber criminals to interfere with or willfully falsify GNSS reception, for example by jamming or spoofing. “In order to be able to use GNSS, at least four satellites are required, all of which share the frequency bands. It is illegal to transmit on these frequencies, that is, to deliberately interfere with the satellite signals, ”explained DIGITAL expert Roman Lesjak during his lecture. And yet, for example, jammers, i.e. cheap GPS jammer is available and in use for around dozen of euros. Who is jamming? For example, people who do not want to be monitored by their employer, such as truck drivers.

A jammer transmits on the same frequency as the signal to be jammed. However, if the jammer sends its signal much stronger, it renders the original signal unusable - making communication more difficult or impossible.
In WLAN this means that the exchange of data packets only works to a limited extent or not at all and the actual data stream can no longer be put together correctly. This can be a critical problem for devices that perform security-related tasks.
However, since the use of a self-made signal jammer is not legal either, we advise against buying it as well as building it yourself.

Since the operation of such WLAN jammers is prohibited in Europe, sources of supply are of course few and far between. So these are not just available in German online shops. When looking for WLAN jammers, there are various online shops that at first glance also make a serious impression and are therefore in German.
If you want to buy you can go to www.jammer-mart.com