dojammer signal blocker

 Cell phone signal blockers are not familiar to everyone, but everyone who has taken a large-scale exam has seen them and put them at the entrance of the examination room. This is not a malicious signal blocking. On the contrary, it is a manifestation of maintaining fairness and providing a fair environment for candidates. However, most of the time, some people doubt whether it will affect the signal radiation of the base station, so that an area has no signal. With the advancement of society and the development of high technology, people's living standards are getting higher and higher. Nowadays, mobile phones have become a living habit for adults and children. For primary and secondary school students, it is more important to influence what they say. Long-term playing with mobile phones may affect their eyesight, and more seriously, neglect their studies. Since the advent of  cell phone signal blockers , they have been trusted by examination rooms, schools, prisons and other...

 Many manufacturers of  portable cell phone jammers  will mark the shielding distance in their product descriptions, and this distance value is generally not marked as an exact value, but usually an approximate number or a range of values. Why is there such a marking method? Some buyers will even ask questions: Can the shielding distance of portable mobile phone jammers be accurate to 1 meter? To find out the answers to these questions, we must first understand some basic characteristics of wireless signal transmission and coverage range (distance). The shielding signal emitted by the portable mobile phone jammer is a radio frequency signal that overlaps with multiple working frequency bands of the mobile phone. This radio frequency signal is disordered and has no specific content or fixed format, which is commonly known as the "white noise" signal. However, its signal transmission method and characteristics are consistent with the characteristics of general wireless sign...

 Standardized examination room  5G jammers  generally choose examination room-specific 5G jammers. The transmission power of examination room-specific 5G jammers is generally around tens of watts, and the shielding frequency band configuration is also different. The commonly used 5G signal jammers are generally basic versions, which can shield frequency bands: 2G, 3G, 4G, 5G, 2.4GWIFI and other frequency bands usually have 8-10 built-in antennas. On this basis, we can choose 5G jammers that shield more frequency bands, such as professional version 5G jammers that can shield frequency bands: 2G, 3G, 4G, 5G, 2.4GWIFI, 5.8GEIFI, walkie-talkie frequency bands and other wireless signals, with built-in 10-12 antennas. Of course, the more shielded frequency bands are configured, the higher the price and the better the shielding effect. How to choose the frequency band should also be based on which frequency bands need to be shielded in the on-site environment and the budget of t...

 If the  signal jammer  fails, you must first know the working principle and how to make the mobile phone have no signal. It is to transmit a white noise interference signal with the same frequency as the mobile phone signal. When the signal strength emitted by the signal jammer is stronger than the signal emitted by the base station to the site, the mobile phone signal is completely covered by the signal jammer, and the mobile phone will show no signal or limited service. How can the mobile phone still have a signal without damaging the device? The following are two methods. First, reduce the power supply voltage of the signal jammer. Generally, it is necessary to connect to the AC 220V mains. The signal jammer has a power adapter or a switching power supply to convert it into DC power. The power adapter and the switching power supply, even if they use a wide voltage power supply, are 85-265V or 100-265V. If you want to make the device fail, then let the power supply v...

 When using  drone signal jammer , first check whether the battery is sufficient and aim at the direction of the drone; secondly, turn on the signal frequency switches of each drone in forced landing mode and the drone will land slowly; keep the GPS switch unopened, and the drone will return in return mode, and it can return according to the original flight route; press the control switch device in working mode to make the drone make forced landing or return according to the selected function switch, release the control switch device to stop working, and the drone will not be affected; finally, please check the battery after use, and charge it in time if the battery is insufficient; 1. New batteries should be fully charged When using a new drone signal jammer for the first time, make sure that the battery is fully charged before using it. It is best to use the battery for the first three or four times, and use up the battery each time. Each time you use the battery, it is best...