Welcome To Dojammer Here is the most professional signal jammer store, we guarantee to provide you with quality jammer products

Cell Phone Signal Jammer Cell Phone Scrambler Interfere With 3G 4G 5G

Hot sale portable handheld 4G cell phone jammer 8 antennas Wifi GPS blocker

This powerful cell phone signal jammer with 8-wire directional antenna will block many signals near certain areas. Including various signals CDMA, GSM, DCS, PCS, 3G, 4G, 4G (LTE), GPS, WIFI, loJack. The coverage can reach up to 30 meters. Lightweight and small device, easy to carry around.

$315.99 $580.58


High performance handheld 4G 5G jammer 16 bands cellular jammer

3G 4G 5G Blocker

The latest handheld design 16 bands cell phone jammer blocking all 5G 4G 3G 2G signals GPS WiFi RF signals 16 watt high output power, Jamming range 2 to 25 meters.

$839.99$1538.99

Latest 16-Band 5G Jammer All Mobile Phones GPS WiFi Signal Blocker

Latest 16-Band 5G Jammer

The latest 16 bands with all-in-one design cell Phone signal Jammer with nylon cover for portable, jamming all types of Android phones, Tablets, Smart Phones, iPhones, Win phones etc.

$819.99$1019.99

New 12 Antenna High Power 3G 4G 5G Cell Phone Signal Jammer

12 antennas signal Jammer

This powerful new signal jammer is designed with 12 antennas and has multiple functions. It can cut off all 3G, 4G, and 5G cell phone signals, and it can also block LOJACK GPS WiFi signals.

$729.99$1409.19

10 antennas high-power portable 3G 4G GPS WiFi cell phone jammer

Portable 10 antennas jammer

The world's first handheld design, with 10 all-in-one frequencies, can block all mobile phone signals, GPS and WIFI signals, and the interference range is 2 to 30 meters.

$650.99$849.99

GSM 3G CDMA DCS 4G WIFI GPS high performance mobile phone jammer

6 bands Cell Phone Blocker

This jammer you can choose to open or close the frequency band according to your needs. With a good heat dissipation system, it can block the mobile phone frequency band WIFI GPS.

$299.99$429.12

8 Bands High Power Portable multifunctional Cell Phone Jammer

8 Bands Jamming Device

This is a jammer that can be used outdoors for a long time. a large capacity battery of 8000 mah. With the extended antenna, a larger interference range than other 8-way handheld jammers.

$539.69$939.85

Powerful cell phone jammer 3G/4G LTE/Wimax-GPS blocker with 12 antennas

12 antennas WiFi Jammer

This is a WiFi jammer with 12 antennas that can provide strong interference signals. Can cut off all 3G 4G WiFi5.8GHz GPS VHF UHF RF 315MHz 433MHz signal. interference is 40 meters.

$619.88$1189.02

8-band GSM 3G 4G mobile phone signal jammer for sale online

portable 8-band cell phone jammer

This is a portable GPS signal jammer, which can cover 30 meters. Such portable signal interference includes CDMA GSM WIFI-2.4G 3G (UMTS) 4G GPS LoJack DCS PCS.

$301.99$473.79

6 Bands All Mobile Phone Jammer block 2G 3G 4G WiFi GPS Signal

4G WiFi Cell Phone jammer

All frequency mobile phone signal jammer, Using efficient cooling technology, built-in 6 cooling fans, the device can work long hours.Jamming radius up to 40 meters

$508.99$889.49

Portable 12-band high-power 2G 3G 4G GPS WIFI 2.4G 5G cellular jammer

high-power mobile phone jammer

One is a professional suitcase portable high-power cell phone jammer used in the market for mobile phones 3G 4GLTE / WIMAX Wi-Fi2.4G / 5G GPS LOJACK UHF VHF signal blocker.

$2499.99$3975.29

Multifunctional and Practical Cell Phone Blocker


Hidden Antenna 16 Bands Cell Phone Signal Jammer 4G 5G WiFi RF GPS LOJACK

The latest all-in-one design portable wireless 5G cell phone jammer, 16 bands jamming all types of Android phones, Tablets, Smart Phones, iPhones, Win phones etc. that use 2G, 3G, 4G,5G and CDMA 450Mhz, Block LOJACK GPS, Wi-Fi 5G, Walkie-Talkie UHF/VHF and RF signals like 315, 433, 868 is popular in 2019 and in years to come.

$760.99 $1499.56


10-channel mobile phone signal blocker

The 10-channel cell phone signal jammer is a green and environmentally friendly mobile phone signal blocker, which only blocks the reception of the mobile phone on site and has no impact on the surrounding base stations. This machine adopts 10 channels of output, which can shield all kinds of mobile phone signals in the range of 1-4 meters (depending on the signal strength of the base station) in domestic and foreign mobile phones; contact was completely cut off.

$389.99 $699.99

Multifunctional Portable WIFI 3G 4G 5G Cell Phone Jammer

The high-power 30W jammer effectively shields 2G 3G 4G 5G mobile phone signals and WIFI signals, and has a wide coverage range of 100 to 200 square meters (-75 dBm). Equipped with precision voltage stabilizing circuit, it can be used normally even in the case of large voltage fluctuations 4. Original chips and circuit boards ensure high efficiency, stable performance and long life.

$369.69 $555.98


5-band adjustable desktop cell phone jammer for GSM 3G 4G WIFI GPS frequency

White aluminum shell high-power desktop mobile phone shielding device, good heat dissipation, can work for a long time. Interfere with GSM, 3G, 4G. The best choice for home jammers. Built-in industrial-grade high-power switch power supply, to ensure the stability of the signal, accuracy.

$316.89 $599.66

The role and application of mobile phone jammer

Mobile phone signal jammers are mainly targeted at various places where the use of mobile phones is prohibited, such as various inspection rooms, schools, gas stations, churches, courts, libraries, conference centers (rooms), theaters, hospitals, government, finance, prisons, public safety and Military power. It is understood that the cell phone signal jammer on the market can limit the mobile phone signal to within 500M meters from the jammer. The shielding radius is adjustable, and the coverage area is more than 30 square meters. The mobile phone signal jammer can only shield the mobile phone signal without affecting other electronic devices. There are also multi-function cell phone jammer that can shield a variety of signals, and there are independent switches to choose the type of shielded signals. Power saving, the power is 12W-480W.

Cell phone signal jammers are indispensable in these places

With the development and popularization of mobile phone communication and Internet technology, various vicious incidents such as secret involvement, cheating, and remote control of explosive devices through mobile phones have occurred from time to time. Therefore, cell phone signal jammers have been born. The products have been developed for many years and have been continuously updated and upgraded. The shielding series security products are widely used in some secret-related institutions, secret-related conference rooms, party and government, colleges and universities, examination rooms, etc., such as:

1. All kinds of large and medium-sized examinations

Fairness and fairness are the fundamental norms of society, and life needs to face many examinations, ranging from small to junior high school entrance examinations, to college entrance examinations, and civil service recruitment examinations. In order to prevent candidates from cheating, in various large and medium-sized exams, it is necessary to use mobile phone signal jammers and other technical means to shield the signals in the examination room to meet the needs of mobile phones unable to communicate and access the Internet. This can also be extremely effective. It is a good precaution for candidates to covert.

2. Party and government, company

Party, government, companies, etc. also have demand for cell phone jammers. It can be said that the frequency of meetings of the party, government, companies, etc. is very high, and in order to allow participants to focus more on the meeting and to learn the spirit of the meeting more deeply, it is necessary to guard against the use of mobile phones. When the leader is in a meeting, he turns on the cell phone signal jammer to shield the cell phone signal. The leader is happy to speak and listens carefully.

3. Powerful places, prisons, detention centers

Some areas that require strict control, such as heavy areas, prisons, detention centers, etc., have a very high degree of confidentiality, and mobile phones should be strictly controlled. In areas such as heavy areas, prisons, and detention centers, shielding cell phone signals can greatly prevent the possibility of leaks.

4. Customs, border defense, oil depot

It is very dangerous to use mobile phones in these places. In addition, in order to prevent criminals from using remote-controlled drones to transport or carry dangerous goods, cell phone jammers and drone shields can effectively protect the safety of low-altitude environments.

About Cell Phone Signal Jammers

The cell phone jammer device transmits signals at the same frequency and high enough power to overload the mobile phone, so that the two signals collide and cancel each other. The mobile phone is designed to increase power when it encounters low-level interference, so the jammer must recognize and match the power increase of the mobile phone.

Mobile jamming devices were originally developed for law enforcement agencies and the military to interrupt communications between criminals and terrorists. Jammers have played a major role in the past. For example, the bomb that blew up a commuter train in Spain in March 2004, and the explosions in Bali in October 2002 and Jakarta in August 2003 all relied on mobile phones to trigger explosives. According to extensive reports, in December 2003, a mobile phone jammer prevented an assassination attempt on Pakistani President Musharraf. When President Bush visited London in November 2004, it was reported that the British police considered using jammers to protect the President’s motorcade through London.