A signal jammer is a device that interferes with reception between an antenna and a wirelessly connected device (VHF, UHF, GSM, 3G, 4G, 5G, Wi-Fi, GPS). Developed for the military and law enforcement, the devices were originally designed to deal with threats such as cellphone-triggered explosives and hostage-taking. To block telecommunications, these jammers create a kind of signal traffic jam that blocks all communications. Like a radio silence bubble, users cannot send or receive any data, calls or text messages while within range of a signal blocker. These jamming devices overload mobile devices by transmitting signals at the same frequency and high enough power so that the two signals collide and cancel each other out.

Basically, it's a radio frequency (RF) transmitter that, depending on the hardware, broadcasts radio signals in the same (or similar) frequency range for Wi-Fi, GSM, 4G, 5G communications. In general, most scramblers have a few meters less range. However, more powerful jammers can create an area the size of a football field. Those used by law enforcement can block areas up to 2 kilometers away from the device.

Low-power mobile phone signal shielding instrument is relatively common for indoor mobile phone signal shielding under normal circumstances. The high-power mobile phone signal jammers are basically used outdoors, and only a few are used indoors. The main reason is to use high-power mobile phone signal jammers indoors when the indoor area is relatively large and the environment is relatively transparent.

When the low-power mobile phone wifi jammer is used outdoors, the most important thing is to pay attention to rain protection. At this time, it is necessary to install an awning above the mobile phone signal shield after the mobile phone signal shield is installed. Generally, the edge of the awning is required to exceed the mobile phone signal shield by about 20 cm. On both sides, at the same time, it should exceed the shield by about 15 cm, so as to effectively prevent rainwater from splashing into the ventilation louvers of the cooling fan. Also note that the power cord of the mobile phone signal shielding device is also waterproof and can be used normally. At the same time, it is necessary to regularly check whether the mobile phone signal jammer is faulty.

The chassis of the high-power mobile phone signal shielding device has been designed to be waterproof before leaving the factory. Under normal rainfall, there is no need to worry about rainwater splashing into the chassis. You only need to pay attention to the installation height of the mobile phone signal shielding device. It can meet the requirements of the on-site installation environment, but also higher than the historical high water level of the site. When the high-power mobile phone signal shielding device is used outdoors, not only should pay attention to rain protection, but also pay attention to lightning protection when necessary. The method of lightning protection is to weld the antenna bracket to the lightning rod, and then insert a steel rod with a length of about 2 meters into the ground, and weld one end of the steel rod to the antenna bracket or lightning rod with a steel wire, or connect it to the lightning rod on the roof. network. Of course, the connector of the power supply cord of the high-power mobile phone signal shielding device should also be waterproofed.