With the increasing popularity of mobile phones, more and more users are using them frequently, and many people do not pay attention to the occasion of use, and do whatever they want. In some specific places, such as conference rooms, courts, libraries, schools, etc., it needs to be standardized. The noise generated by frequent use of mobile phones destroys the quiet and serious atmosphere of these places. It has affected the development of people's normal work. It is difficult to achieve significant results if we only rely on human beings to ask for prohibition. However, only one handheld mobile jammer is needed to solve the problem of indiscriminate use of mobile phones in the conference room, avoid personnel waste and reduce personnel costs.

The effective shielding distance of the handheld mobile jammer is closely related to the distance of the site base station. In general, a conference room within 200 square meters only needs one jammer to perfectly shield mobile phone signals. However, in some conference rooms, you will find that mobile phone signals of China Telecom and China Unicom can be normally shielded by using a handheld mobile jammer, but mobile phones cannot be shielded or the shielding distance is relatively short. The root cause of this phenomenon is that the mobile phone signal of China Unicom / Telecom in this conference room is weaker than that of China Mobile, and the shielding effect is better than that of China Mobile. That is, the mobile base station is closer to the base station of China Telecom / China Unicom. The relationship between the handheld mobile jammer and the base station is opposite. Both transmit electromagnetic wave signals of the same frequency band, and the jammer transmits electromagnetic wave signals to suppress signals from the base station. The transmission power of a single channel of the shield is generally 2-3W. If the base station signal is too strong, it cannot be suppressed. The handheld mobile jammer cannot be shielded.

Then, in the same conference room, the jammer can only shield telecom / Unicom, but cannot shield mobile or the mobile shielding distance cannot meet the requirements. What should be done?

The reason why the shield cannot shield an operator is that the transmitting power of the mobile module in the handheld mobile jammer is too small to suppress the signal of the base station. At this time, the mobile module in the mobile high-power jammer can be added separately. The high-power jammer sma-818k90 produced by Nanjing Baikang Electromechanical Technology Co., Ltd. is made of independent modules, which can be used independently or in combination. For the case that the mobile phone signal cannot be shielded, the mobile module can be added separately, and the low-power handheld mobile jammer can be combined to achieve full shielding.