Car jamming devices Jammers: what are they for, how to choose

Most likely for work, if you are thinking about finding and buying a signal jammer, you need it for work. Tasks of all suppressors are different: for example, in the car - to protect against tracking or activation of explosive devices; in offices - protection from wiretapping at meetings or in the executive office, security of conversations on the wire phone (secure line).

Most often it is a suppression of GPS, GSM, or Internet channels: Wi-Fi, 3G, 4G, LTE. These frequencies work in various combinations, based on the purpose of the device. Some manufacturers put the whole mesh of frequencies in one device and guarantee extraordinary properties than spoil the reputation of efficiency in general.

From our article, you will be able to extract basic information about jammers on simple examples, which will help you to spend your money wisely and not regret the purchase. Despite the fact that the choice seems simple, there are many factors that affect the effectiveness and reliability of the device

GLONASS and GPS jammers for the car

Transport companies and courier services install satellite positioning beacons in corporate cars. With their help management monitors the route, speed, fuel level in the tank, and stops, and stops of transport. The beacon cannot be switched off unnoticed. It works round the clock without intervals: as long as GPS satellites are in orbit, this small device will calculate and transmit coordinates. It can’t be switched off, but the signal can be jammed.

Car jammer devices are special devices that block satellite positioning. They block beacons not only in transport but also in smartphones, phones, and clothes. Blockers can come in handy for a variety of reasons, for example, if you suspect that you are being followed by competitors or burglars. Blockers are also of interest to those who would like to turn off the intended route or drive an extra distance in a corporate vehicle. However, you should be aware that there are a number of legal and technological nuances that significantly limit the possibility of using such hardware.

How to choose the right device

Case types and sizes

You can often see metal cases with antennas sticking out of them. As a rule, these are Chinese devices of low quality, with weak suppression characteristics and high levels of UHF radiation. Ask yourself what goal you are pursuing: to save money or to suppress the desired signal. It is important that no device will give a 100% guarantee, regardless of cost or country of manufacture. Chinese devices are easy to distinguish: they all look the same, as a rule, only their names change. Believe it or not, this is a separate article on marketing. The same devices can be camouflaged in a suitcase, bought on the market, and called anything, but it is necessary to unscrew the plywood from the suitcase and we will see the same metal case with antennas. More about the features of such devices we have written below.

Also, jammers come in plastic cases of different sizes, which indicates a different approach to the suppression result and principle. The price for such devices is often higher. It may be concluded that the heating is minimal or nonexistent. As a rule, the antennas in such suppressors are built-in.


The question of power is important and, as we believe, of efficiency, there are many nuances that can be confusing.

The design of the Chinese device in terms of circuitry is primitive. To increase the radius, manufacturers increase the power, for which they hide the device in a metal case, which partially serves as a radiator. Do not forget that the powerful device can not be used near - it is harmful!

Signal retention

There is also the possibility of knocking off the frequency suppression, but without special measuring equipment, the user will never know about it. This is the main difference from plastic jammers. Domestic jammers are much more expensive, but they can serve for several years providing trouble-free work.

Presence of battery

Silencers may be stationary (working from the net) and portable, with a built-in battery. At the same time, even when using a device with a battery in the car, it is recommended to apply for power and work from the mains to increase efficiency.

Also, different types of suppressors may differ in the presence of external antennas and channel regulators.

The main parameter is the frequency grid

This characteristic is the most important since it is simply impossible to adapt one device for all tasks. Here everything is simple: the more channels, the less power per channel. The most effective will be a good stationary device in a separate room.

If mobility is required, it is recommended to choose several devices of low power with a useful signal, or, in the extreme case, one device, but looking for an opportunity to give power. As a rule, the range of the plastic portable jammers corresponds to the stationary Chinese ones.

Drone signal jammer - jamming UAV and drone radio frequencies. We have developed a range of desktop and powerful drone jammers against quadcopters UAVs operating at GPS, 2.4 GHz, and 5 GHz frequencies -

Signal transmission, or why the jammer does not work

The proximity of the operator’s antenna

This is a burning issue in the megapolis, for the last 3-5 years it is almost impossible to work steadily with any suppressor. At the same time, solving some problems is quite realistic, using some of the knowledge from this article.

Cell congestion

The operator’s antenna is designed for a certain number of subscribers and has a high power, which may affect the work of the jammer in the vicinity in different ways.

Correct location

The jammer must be away from metal surfaces and conductors (e.g. human body). The device may work differently if it is in your hand or in a bag you are holding.

GPS GSM Suppression

It is more important to suppress the GPS channel because it is highly accurate and GSM is only needed to send coordinates to a server. That said, some beacons can still determine the location by sim card, with a high error rate (on average 200-300 meters). With a working jammer, even if your phone finds the network, this error increases by times (because not all data packets are not sent) and can reach values up to 2 km, but the track will not write as by GPS.

This can happen near the operator’s antennas, the GPS is not affected and it is always reliably jammed.

Why your old jammer does not work as before? It’s simple: before, the antennas were on the roofs of houses and skyscrapers. Today in the cities they are located even on lampposts and small stores (you can easily see it by looking closely), and therefore you are likely to need to supplement your device or replace the suppressor with the specifics of your wishes.

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