Welcome To Perfectjammer Here you can get the latest information about jammers. Hope our information some help to you

Handheld Cell Phone Blocker 16 Bands 5G Jammer

How to use the signal jammer in the exam room

Perfectjammer 2022/08/01

  The test room signal jammer is an essential tool in the test room to prevent candidates from cheating through scientific and technological means, and escort the information security of the test room. However, if we do not use the signal shielding equipment correctly, the shielding effect will be poor, and even an accident in the examination room will occur.

  The effective shielding range of the signal jammer in the examination room will vary in different use sites. This is closely related to the signal field strength at the scene. Mobile phones of different standards may not necessarily have the same shielding range at the same site

  The normal installation height is 1.2 meters to 2 meters. Try to install it in a position where there are no obstacles between the target shielding area. For wall-mounted installation, the antenna is required to be vertically upward, and there should be no AC power lines or other audio and video lines within 0.2 meters of the antenna.

  Each antenna has a frequency band mark, which must be in one-to-one correspondence with the frequency band mark on the host. Before the shield is turned on, it must be ensured that each antenna is connected reliably. Never use it without an antenna connected, as it will damage the jammer device.

  Factors affecting the shielding range include but are not limited to: distance from the base station, orientation, no obstacles, wall material of the building on site, installation height of the jammer, installation specifications, etc.

  After working for a long time, the surface temperature of jammer gps is about 40-50℃, which is normal. If the surface temperature is too high, turn off the power and try to contact your local dealer or agent

  During use, in order to avoid possible interference to some electronic devices, try to keep more than 1 to 2 meters away from the following common devices: audio, wireless microphones, radios, computers, TVs, Wi-Fi routers, etc.

New 12 Antennas Desktop Mobile Phone 3G 4G 5G Jammer WIFI GPS LOJACK UHF VHF

12 Antennas  5G Jammer

The powerful mobile phone WIFI GPS 5G signal jammer is designed with 12 antennas, which can not only cut off all 3G 4G 5G mobile phone signals, but also block WiFi GPS LOJACK signals. Adjustable at 79 watts, the device has an interference radius of up to 80 meters depending on the signal strength at the specific location. Built-in 5 cooling fans work non-stop.


Hidden Antenna Blocker

Adjustable Box Type Hidden Antenna Wifi Cell Phone Jammer

Excellent design and reasonable price, both of which are very useful. The feature is very powerful, I've used it and I'm very happy with this excellent feature!

Date Added: 10/22/2021 by Derry day