Unless you happened to notice the absence of a click or light flash from your vehicle, you'd probably assume it locked and walk away, allowing the criminal to steal any valuables in the car (or take the car itself). This means a thief could watch you park your car, turn on the jammer before you press the lock button on the fob, and prevent your car from locking. The first demo video clip shows how a portable jammer can be tuned to the frequency of a car keyfob, blocking its signal at the flip of a switch. They can affect your daily life in several ways - veteran-owned surveillance gear manufacturer Tiny Transmitters posted some surprising demonstrations on Instagram to prove this point.

Signal jammers are inexpensive, easy to use, and readily available online to those who know where to look. The Soviet Union and China jammed various incoming signals, Cuba blocked American radio stations, and North and South Korea jammed each other's transmissions.Īn example of a portable signal jammer available for sale on the internet, listing the frequencies it claims to block.Īt this point, you may be thinking, “I'm not a high-value military target or part of a warring drug cartel, so I shouldn't have any reason to care about signal jammers.” However, this is certainly not the case. Jammers saw extensive use during WWII, when Nazis jammed Allied radio transmissions in occupied Europe, and only grew in popularity through the Cold War era. Military & Paramilitary Use of Signal Jammers Jammer range varies widely based on the power and scale of the device a small handheld jammer might be effective within 100 meters or less in an urban environment, while large military-grade jammer emplacements can easily reach hundreds of miles across open terrain. Traditionally, this meant disrupting radio communications, but the same core principle applies to other types of wireless signals - cellular, WiFi, Bluetooth, GPS, and so on. By tuning a jammer to a specific target frequency range and blasting high-powered noise, tones, or pulses, a jammer can interfere with nearby receivers that are attempting to listen on that frequency. Generally, jammers disrupt existing wireless signals by simply drowning them out with noise. Unfortunately, these signals are vulnerable to another type of wireless device: signal jammers. On a larger scale, much of our military and civilian infrastructure relies on wireless communication. Stolen or misplaced items can be located with LoJack or wireless AirTags. When we go somewhere new, we rely on GPS to guide us. We wake up in the morning and check our emails over WiFi, unlock and start our cars with the key fobs in our pockets, and use our cell phones to make important calls on the way to work. Our society has become increasingly dependent on wireless technology.

Wireless signal jammer app