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Prisoner in orange jumpsuit behind bars

Putting an End to Cell Phone Prison Contraband with Signal Detectors

With legislation firmly in place to put an end to illegal prison contraband like cell phones, cell phone jammers and signal detectors are aiding in increased public safety.

If you are convicted of a crime, you go to prison. Prison is supposed to deprive you of rights and privileges. You eat, sleep and work on a rigid schedule.

You don’t get contact with the outside world.

Unless you manage to connect with some prison contraband. Some contraband sounds harmless- junk food, makeup, cigarettes. But cell phones are a huge problem. For example:

Control of prison contraband is a priority. Tools to stop outside communication are available. Read on to learn more.

Prison Contraband of the Most Dangerous Kind

Weapons, drugs, money and more are dangerous and illicit behind bars. However, a mobile device and mini-computer that allows connection to accomplices outside the walls does the most damage. With it, criminals continue to do business and function just as they would outside of prison.

A cell phone allows coordination and organization of almost all other contraband. It’s small and easily hidden. Thanks to modern technology, there are few places it can’t reach.

Smuggling phones to inmates involves complicit guards, attorneys or other more clever ruses. Some smugglers resort to drones or versions of a file baked into a birthday cake. No matter the effort to stop phones from entering prison, a few get through.

A Major Problem 

Security experts would call cell phone proliferation an epidemic. In South Carolina, prison officials discovered and seized one phone for every three inmates. In Oklahoma, every six prisoners yielded and an illicit phone.

With some 2.4 MILLION people locked up around the country, that is anywhere from 400,000 to 800,000 illicit phones in the hands of criminals. Phones allow inmates to use social media, conduct business, access banks and more.

It isn’t only a U.S. problem. At least 15,000 mobile phones or SIM cards were confiscated in English and Welsh prisons. To combat the onslaught, officials scramble or block cell phone signals

Some prisons use fake cell networks to grab the signals then track and block communications. “Grabbing” allows legitimate cell phones and SIM cards access while blocking others. It is expensive and limited to older technology.

Blocking Signals Doesn’t End Cell Phone Use

Jamming cell signals isn’t foolproof. Cell phone jammers also have a human component. Blocked signals affect legit phones as well as the contraband ones. Mobile reception is blocked entirely, jamming blocks all phones and SIM cards within the jammer’s reach. 

Guards and other staff can “accidentally” cut the power or otherwise disable jammers. Even short outages allow phones to connect to the outside world.

A cell phone used for its computer functions works just fine without a signal. A smartphone works great as a small computer and data storage device. Connection to Wi-fi allows voice calls, data transfer, and ubiquitous social media.

Inmates use devices to record messages and videos, then move the phone or the SIM card around. Accomplices pass the data and messages to the outside or to prisoners in other parts of the facility.  

A Multi-Layer Approach to Thwart Contraband

Invent a new method to block communication and contraband, and people will find a way around it. A mixed approach works best and keeps inmates guessing. It also helps avoid “help” from inside sources, since different people perform different tasks.

Limit contraband entry. Visible features like metal detectors and x-ray equipment deter smuggling. Portable detection units, random screens, and highly trained staff also make a dent in the problem.

For the more “clever” contraband smugglers, high fences and nets, drone jammers, shakedowns, etc. remove additional units. Of particular use is a signal detector. It locates cell, video, and audio transmissions to allow swift removal.

For phones that manage to slip through, cell signal jamming is useful. Overlapping transmitters can prevent outages. Repeated signal detection and search on exit detects outgoing messages.

How Does Signal Detection Work?

A high sensitivity detector doesn’t interfere with signals but specifically locates the signal source. A broad range of detection is used to locate cell signals, wireless audio, and video taps. The frequency range is 25MHz to 6000MHz. 

Pinpointing the signal allows prison officials to remove the phone the minute it is switched on. Signal detection units are small and portable. Frequent regular and random use prevents predictable communication.

People Make the Difference

People are the most important success factor for prison contraband control. All the training, technology and cutting-edge tactics fail if the staff ignores them. The human factor is both the weakest and strongest point in any facility security system.

Highly qualified, highly trained and highly motivated officials and staff make a difference. Regular refresher courses with technology deployment keep learning fresh. Prompt attention to HR issues reduces the temptation for corruption.

Nothing substitutes for human ingenuity. As fast as prisoners innovate, staff can create countermeasures. Tools like detectors and jammers in the right hands eliminate a number of phones.

Use All the Tools at Your Disposal

Criminals never stop their attempts to smuggle in mobile phones and other prison contraband. Their creativity and drive keep prisons around the world on their toes. There no single solution to cut off unauthorized communication.  

The ideal way to limit and control contraband is an approach to security that encompasses the entire facility. A multi-layer strategy uses state of the art tech and traditional methods. It encompasses the human element, too.  

High-quality training, high motivation, and a disciplined approach are the ideal ways to disrupt prison contraband.  Tech tools to limit entry, block signals and detect hidden mobile phone signals are only part of the equation. 

Attacking the problem from inside and out is the most effective way to maintain order, security, and safety for prisoners, staff and the public– inside and outside prison. To learn more about tech tools at your disposal, contact us today. 

Flying Drones

Everything You Need to Know About Drone Jammers

The commercial use of drones raises concerns for the average citizen. Those concerns lie with privacy and public nuisance. Drones take up commercial airspace, yet are small enough to buzz past us while we are standing in our own backyards and driveways.

According to attorney Lisa Ellan, “From catastrophe response to news-gathering to construction-site monitoring, commercial drones represent one of the fastest-growing sectors in technology.”

Ellman is an attorney at an Flying Dronesunmanned aircraft systems law firm. Her statement is no surprise to some of us.

Read on to learn about the problems with commercial drones and how you can stop them with drone jammers.

The Problem with Commercial Drones

There are a wide variety of UAV shapes, sizes, configurations, and characteristics. Commercial or civilian drones are of special concern. Most drones have high-resolution cameras that can invade your privacy. They can capture images of you and your personal property.

People also use drones to smuggle drugs. Or they use them to crash into buildings or act as a remote “peeping Tom.” They can cause harm when carrying a payload of explosives or artillery.

For these reasons, jammers that block the drones’ remote control signals are of interest. They can protect your privacy and even your safety.

Jammers are also called signal blockers. They are devices that block radio communications signals. A pilot on the ground remote-controls an Unmanned Aerial Vehicles (UAV). Therefore, blocking the radio signal renders a UAV useless. The drone will either fall to the ground or land, depending on its programming.

The Legality of Drone Jammers

Jammers, which block GPS, cellular communication, and WIFI signals are illegal in many states, countries, and municipalities. The information contained in this article is for educational purposes only, and anyone looking to purchase a jammer should first check their local regulations prior to ordering and/or use.

The use of jammers is often limited to federal, military, or other law enforcement personnel as they have special permission to use the technology.

DroneDefender, a Counter-UAS Device

Pilots man drones by remote control. They are vulnerable when something blocks the communication between the UAV and pilot.

At the Battelle Memorial Institute, engineers developed a directional jammer called the DroneDefender. This jammer looks like a combination rifle and antenna. Due to federal regulation restrictions, the DroneDefender is for government use only.

How the Jammer Works

When locked onto a drone, the drone jammer disrupts the GPS and radio signals guiding it. It is effective from up to 400 meters (1,312 feet) away. This makes it a long-range weapon.

The disrupting technology deploys in a 30-degree cone, so the jammer can also hit one of the faster, fixed-wing drones.

What Happens to the Drone

The cheaper, less complex drones will simply fall to the ground when hit by the jammer.

Others will revert to a fallback mode, such as return home or hover to the ground. The advantage is that no collateral damage results from the drone falling from the sky. Further, the jammer would not destroy the drone itself. If the drone belonged to an innocent party, all the better.

In other cases, the drone could belong to someone using it for illegal activities. Law enforcement would have the opportunity to confiscate the drone intact. If the drone’s emergency protocol is to return to home base, law enforcement would have a way to track the drone’s path. The drone’s destination could lead to the location of the operator.

Available Drone Jammers

There are dozens of drone jammers available to the public. Though, the intended customer is, of course, law enforcement. The following are a few of the models we know and recommend. For full details on these jammers, select the links listed with each description.


The TSJ-ManPackUAV is a highly portable drone defense system. It comes in a backpack for portability. This jammer is effective on most drones, like the DJI, Phantom, Advanced, Standard and Inspire Series, for example.


The TSJ-UAV30174 is a hand-held directional four-channel antenna drone jammer. It has a total output power of 82W. The coverage area is 400-1000 meters.

This jammer is also effective on most commercial drones such as DJI, Phantom, Advanced, Standard and Inspire Series.


The TSJ-UAV3077 is a seven-band, outdoor drone blocker. It prevents drone intrusions at fixed locations. You can protect your facility with this jammer. It is one of the highest quality anti-drone jammers available.


The TSJ-UAV3078 is a powerful eight-band, portable, rugged outdoor UAV jammer. It prevents drone intrusions at event locations.

You can transport this unit easily and set up in under 10 minutes. Like the TSJ-UAV3077, use this jammer to protect your event or facility. It is one of the highest quality drone protection units available.


The TSJ-UAV6067 prevents drone and UAV aerial intrusions in restricted areas or during events. This unit is a durable drone jammer. It is has a protective Pelican case. It features a total output power of 260W. With that, the coverage area is 800-3000 meters.

Drone Jammers Prevent UAV Breaches in Safety and Privacy

In its least concerning form, UAVs are a public nuisance. Though, drones can present valid security issues at public events or secure facilities. Concerns aside, drones are here to stay in the civilian sector.

Drone jammers are one way for security professionals and law enforcement to deter drones from compromising our safety and privacy.

If you have any questions about jammers or need more information about one of the products on our website, please contact us.

Hooded hacker surrounded by code

How Signal Jammers Protect Data When You’re Offline

Evidence of hackers stealing data is everywhere on the web. Just recently, over 140 million Americans had their personal information stolen during an Equifax data breach.

Now, though, we can go the extra step and protect our information with top technology like signal jammers.


With the Equifax breach alone, Social Security numbers, birthdates, and other extremely sensitive data were stolen by hackers. And this isn’t an isolated incident.

Hacking occurs daily in small doses around the world, evolving with technology to be smarter and better. That’s why it’s critical for businesses and organizations with sensitive data to invest in the added security of signal jammers.

Even if you think your data is safe when you’ve turned off the computer and left the office, think again. Hackers might not even need computers to be online anymore.

In this article, we’ll cover how signal jammers can protect data even when you’re offline.

Signal Jammers Aren’t New

Actually, they’ve been around for many years in different capacities. Signal jammers can be traced as far back as the radio wave.

Today, signal jammers are used by testing facilities to ensure test takers aren’t cheating on exams. They might also be used in operating rooms to prevent certain signals from affecting equipment.

Private sectors use them regularly (if not continuously) to prevent data attacks and hacking. We’ve even heard of jammers used in churches to prevent the use of cell phones.

The technology behind signal jammers can prevent just about any type of reception (from cellular to wifi and radio).

Essentially, if someone is trying to prevent another person from stealing data, they need to block the signals that are floating between their technology.

Data in the Air

In what we can consider the “good old days,” hackers were more restricted and had to be in direct contact with a computer or database to steal.

Things have changed, though. First, the internet allowed secret doors, and now some hackers don’t even need the web to steal.

Earlier this year, the New York Times reported a new technology from the NSA that allowed access to a computer even when it wasn’t online. This is a threat that hackers are now aware of, too.

Not all threats can be prevented, but companies should take every measure to protect their data. This means investing in programs and new technologies that will prevent hackers from getting in and prevent information from getting out.

Hackers can use electromagnetic radiation spying and breach steel walls or use a smartphone’s accelerometer as a Key Logger.

Businesses and organizations even need to protect the data exchanged between computers on wifi signals in their own buildings. It’s a lot to consider!

And the answer is the jammer.

How Signal Jamming Works

Consider the following example:

You’ve got a friend who is whispering all of your secrets across a giant room. You come closer and you can hear the secrets clearly. You stand across the room and you can hear them bouncing around the walls.

It’s not a big deal until someone else enters the room.

This new stranger, no matter where they are standing in the room, can also hear all of your secrets.

How do you fix it? You create a lot of extra noise.

That’s basically what a signal jammer is. Depending on the type of signal you’re trying to block, the jammer will create enough noise to scatter the rest on that wavelength.

Think of it like this: If you bring in a bunch of people to that big room, it drowns out the noise of the whispered secrets. Some jammers act like a screaming person who shouts into the ear of whoever is trying to listen in.

They help protect your information by making sure the data is either scrambled or indecipherable to potential hackers.

Protecting Data Even When You’re Offline

A lot of people get the impression that if a computer is turned off or is offline, then the information inside is safe. If only that were the case!

Instead, hackers can use technology and tricks to steal data from a short distance away. That’s where the jammer comes in!

Signal jammers can be used to prevent anyone from using their cell phone from distances of over 70 feet away. They can be used to block wifi signals and prevent data from being snatched out of the air.

Even when you’re not in the office, or when the computers aren’t running, nearby jammers will stop data leaks by creating a constant storm of frequency noise.

Sure Protection Against Creative Hackers

Recently, stories of hackers going the extra mile to obtain data from private sectors have surfaced on the web. Hackers can now record data from the use of machines that interpret information from computers.

The latest and craziest is the use of drones, remote-controlled aircrafts, to steal information from private sectors.

How can you protect the data when no one is around to discover the culprit? Or when they are operating a drone?

Some organizations choose to paint their walls with paint that has copper flakes to prevent information from escaping. Others just use jammers to make sure their information is scrambled, whether it leaks or not.

Signal jammers can scramble all types of frequencies (even the ones used by hackers). A signal jammer will put off a loud frequency noise that can drown out the communication between hackers and their devices.

This frequency pollution can reach great distances depending on the product purchased, ensuring safety for a great distance.

A Necessary Precaution

Long past writing everything down on paper, we’ve discovered the ultimate way to store data: on computer chips and now the Cloud. And hackers are developing new devices like the drone to break into these databases every day.

The battle for protected data will go on, and you’ll rest easier at night knowing your information is secure behind a jammer.

And if you’re looking for quality jammers that last, you’ve come to the right place! Browse our list of products and find the perfect jammer for your needs–with free shipping!

White Flying drone with camera

5 Reasons Why You Need Drone Jamming Technology

As drones become more popular, concerns are starting to mount. Here are 5 important reasons to start using drone jamming technology.

You’re watching the sun dip between the mountains in a picturesque moment of calm. The park seems deserted. It’s just you, the ambient noises of nature, and the sunset.

Suddenly you hear a loud buzzing sound, too loud to be any bee or mosquito.

All of a sudden a drone swoops down from the sky and almost takes your head off.

Whoever was controlling it is too far off to see. Wherever they were they obviously didn’t see you – such was their haste to get the best video of the sunset you thought you were enjoying alone.

Situations like these are becoming more and more common. And, they’re convincing more and more people to invest in drone jamming technology.

With the laws surrounding the legality of where and when drones can be used remaining vague, the need for drone jammers is becoming increasingly necessary.

Here are five reasons you should consider purchasing a drone jammer of your own.

1. Protect Yourself from Operational Error

That sunset scene could have taken a turn for the worst if the user of that drone was not paying more attention.

Drones can be extremely dangerous if they are flown toward someone at high speeds. Many drones are able to achieve speeds of 35 miles per hour. Racing drones can easily reach 50 miles per hour.

If the user of that drone had accidentally flown it straight into your head at its highest speed, you could have been severely injured.

To operate a drone, you don’t need to pass a test.

Don’t let leave your safety in the hands of someone who might not know what they’re doing.

Your only protection, in this case, is investing in drone jamming technology.

2. Drone Jamming Works

Because drones are always operated remotely, their connection with the user can be targeted.

After many have tried a number of eclectic methods of getting rid of drones, including training birds to snatch them out of the skies, jamming their frequency has emerged as the most effective method.

Most drones available on the commercial level for less than $50 on Amazon rely on either WiFi or GPS signals to remain connected to their users.

WiFi jammers have been around for a long time and have proven effective in drone jamming.

Once within a WiFi jammer’s range, the drone’s connection is interrupted which will cause it to either immediately return to its user or drop out of the sky.

3. Protect Your Privacy

The scariest aspect of drone use is the anonymity granted to its users. You really never know who exactly is piloting them.

And nowadays, anyone could be.

Drones have been used by TV broadcast stations, private corporations, law enforcement agencies, government agencies, and private citizens.

As of now, there are a certain set of guidelines that the government calls “Voluntary Best Practices” which spells out how drone users should respect other people’s privacy.

These guidelines include:

  • Notifying someone when a drone will be gathering data in or around them or their property
  • Protecting that data
  • Not using that data to make determinations about someone’s employment, promotion, or health care related eligibility.

However, as the name suggests, all of these rules are voluntary.

If a company wishes to take pictures of your license plate when you are getting treatment at a specific health care clinic in order to sell that information to insurance companies, they can.

Until the government establishes any kind of firm laws that will protect your privacy, you need to take matters into your own hands.

With a portable drone jamming device, you will be protected from prying eyes.

4. New Legislation Could Be Coming

The laws regarding drones can be difficult to understand. And, they are subject to change.

As of now, the space from the ground to 200 feet in the air above your property is considered your private property. Any infringement on that property from a drone is technically illegal.

Some states give people rights to use force on people who have trespassed on their property. However, drones are not yet subject to those same laws.

Drones are considered aircrafts, and, as such are subject to a different set of laws.

Any interference with an aircraft, even if that aircraft is privately owned and is trespassing on your property, is considered hijacking.

However, few court cases have really delved into this distinction other than the “Drone Slayer” case of 2015.

In this case, the owner of a drone was suiting a Kentucky property owner for shooting down and destroying his drone. The Kentucky man claimed the drone was trespassing on his property.

The judge ended up ruling in favor of the Kentucky man, claiming that establishing a precedent for aerial trespass by drone was a matter for the state courts.

However, this dismissal in itself has set a precedent.

More cases like this one are bound to come up and challenge the Federal Aviation Associations’ claim that drones should be treated as aircraft.

New legislation will be on the horizon soon. When the laws do change, you want to make sure you’re well equipped to knock down any drones that are flying around your property.

5. It’s Easier Than You Think

While very high tech version of drone jamming technology exists, most commercial drones can be taken out with a simple disruption in WiFi or GPS connection.

Disrupting a WiFi connection can be accomplished with a laptop and an antenna.

By accessing Telnet you can open a terminal application to the gateway address of the drone, which is usually Once connected you can shut off the drone without the operator knowing.

For GPS controlled drones, you can invest in a GPS jammer which is relatively cheap and extremely portable.

Drone Jamming Technology – Protect Your Privacy

As you can see, it’s important to stay up to date with current events in the field of drone jamming.

Make sure to stay informed by reading our blog and, why not check out the store to ensure your privacy today!


Welcome to the new blog for The Signal Jammer.  Be sure to check here often for new blog posts regarding industry news, new product launches, and general tips and information.  If you have any questions please be sure to use our contact page and get in touch, we’re happy to answer any questions you may have!