The shielding range of the mobile phone jammer is a spherical shape

There is no way to stop it. The shielding device is a so-called mobile cell phone jammer, which can shield all communication signals and cannot be stopped. The mobile phone jammers currently on the market can limit the signal of mobile phones that are 200 meters away from the transmitter and have a radius of more than 20 meters. The shielding radius is adjustable, which only shields mobile phone signals and does not affect other electronic devices. Save electric energy, power 20W. When the mobile phone is working, it is within a certain frequency range. The mobile phone and the base station are connected by radio waves, and the data and sound transmission is completed with a certain baud rate and modulation method.

For this communication principle, the scanning speed will cause garbled interference in the SMS signal received by the mobile phone, and the mobile phone cannot detect the normal data sent by the base station, resulting in the mobile phone being unable to establish a connection with the base station. The mobile phone is manifested as a search network, no signal, no service system and other phenomena. Common mobile phone signal jammers on the market have operating frequencies: 869~894MHz; 825~960MHz; 1805~1880MHz, 1900~1990MHz, etc. The working frequency bands are CDMA800, GSM900, DCS1800, PCS1900. It can control a range of about 40 meters in diameter, using a DC-DC converter input voltage and 5V output voltage.

In addition to shielding WiFi2.4G and Bluetooth signals, the signal jammer can also shield the signals of 2G and 3G mobile phones at the same time, which is really powerful. In addition, due to the design of the car charger, the mobile phone jammer can also be used directly in the car, because after the Bluetooth jammer is powered off, you can use the car charger to charge it and then fully charge it. Moreover, the size of this mobile phone must avoid the strong electromagnetic environment in order to ensure the barrier effect and long-term stable operation. When not using the mobile phone jammer, please turn off the power in time. When used outdoors, waterproofing is very important. Do not disassemble the antenna during deterrence, so as not to affect the shielding effect. The actual shielding range may vary depending on the location of use. The effective blocking area is a circular area centered on the sword. For mobile phone signal jammers, the effective distance (30-40 meters) generally refers to the indoor distance. The shielding distance can reach hundreds of meters in outdoor areas. The effective range of the interfering device is related to environmental conditions such as the distance of the base station and the installation location. These factors need to be carefully considered so as not to affect the shielding effect. The strength of the electromagnetic signal from the mobile phone signal jammer is very weak.