With the increasing awareness of confidentiality or environmental maintenance among the public, the demand for mobile signal jammers in many venues has also greatly increased, resulting in a vast market for mobile signal interference. However, most users lack sufficient understanding of mobile phone jammers. To achieve better results, one-sided selection of high-power interference meters can bring many hidden dangers.

For small examination halls and meeting rooms, choosing a mobile phone jammer with a single channel transmission power of 2W-10W can achieve good interference effects. However, according to our survey of large examination halls and important conference venues, many places often unilaterally pursue high-power interference. For example, in a usage site with over 20 examination rooms, each classroom is equipped with a jammer. In addition, after the exam, due to the lack of attention to usage, there are often a small number of mobile signal interference devices that do not shut down in a timely manner and emit interference signals for a long time.

Therefore, I strongly urge all places that require the use of mobile signal interference devices to:
1. Do not blindly choose high-power mobile phone signal jammers. For classrooms, choosing 2W transmission power shielding is sufficient to achieve the shielding effect.
2. In addition to daily interference needs, remember to turn off the mobile signal jammer in a timely manner after use to avoid long-term startup that may cause communication interference to surrounding residents.
3. Be sure to choose a legitimate manufacturer's mobile phone jammer. Mobile phone signal jammers produced by informal manufacturers are often designed to achieve a larger interference range. When debugging the equipment, they do not follow relevant standards, resulting in the interference of nearby residents or operators' base stations when the jammer is turned on.