Understanding the Usage and Selection of Signal Blockers

A comprehensive guide to choosing the right Signal Blocker for your needs

Signal Blockers have become increasingly popular in various settings, such as exam halls, conference rooms, and offices, to block unwanted signals. However, before purchasing a Signal Blocker, it is essential to understand which signals it can block and the appropriate power level required for different environments. This article aims to provide a comprehensive guide to help users make informed decisions when selecting a Signal Blocker.

Understanding Signal Blocking Options:

  1. Before making a purchase, it is crucial to determine which signals you want to block. Signal Blockers can be designed to block 2G, 3G, 4G, and 5G signals. Depending on your requirements, you can choose to block specific signal types or opt for a jammer that covers the entire frequency range. Customization options are available to adjust the jamming capabilities according to customer needs.

Choosing the Right Power Level:

  1. The effectiveness of a Signal Blocker depends on the power level it operates at. For indoor environments like exam halls, conference rooms, and offices, low to medium power jammers are suitable. However, in open outdoor areas, such as vast open spaces, a medium to high power jammer is necessary to achieve the desired jamming distance.

Understanding Power Levels:

  1. Signal Blockers are generally categorized into three power levels: low, medium, and high, with power ranging from 10W to 100W. It is recommended that users select a jammer based on the actual area they need to block signals in.

Determining Coverage Range:

  1. The coverage range of a Signal Blocker is directly proportional to its power level. In most cases, low power signal jammers are sufficient for exam halls, with one device installed per classroom. For high power jammers, the blocking distance can reach up to 300-400 meters, depending on the local signal strength.

Considerations for Size and Portability:

  1. Signal Blockers come in various sizes. Generally, smaller jammers are more compact and convenient to use, similar to a laptop. These are suitable for indoor environments. On the other hand, high power jammers are larger and often designed in a portable suitcase-like form, making them suitable for outdoor use.


When considering the purchase of a Signal Blocker, it is essential to understand the signals it can block, the power level required for the desired environment, and the size and portability that best suits your needs. By making an informed decision, users can effectively block unwanted signals and ensure a disturbance-free environment in various settings.