The shielding range of a mobile signal blocker is influenced by various factors, including the device's technical specifications, power, antenna design, working environment, etc. Generally speaking, the shielding range of a mobile signal blocker can range from a few meters to tens of meters.

The following are some key factors that affect the shielding range of mobile signal blockers:

Equipment power: Higher power signal shields typically provide a larger shielding range. However, in some regions, the use of high-power signal shields may be restricted by regulations.

Frequency bands and technical standards: Different mobile phones use different frequency bands and technical standards (such as 2G, 3G, 4G, 5G, etc.). Signal blockers need to cover these frequency bands and technical standards to effectively block various mobile phone signals.

Antenna design: The antenna design of the device plays a crucial role in the reception and transmission of signals. Some high-quality signal jammers may adopt a multi-directional antenna design, which improves their shielding effect in different directions.

Working environment: The structure of buildings, electromagnetic interference, and surrounding environment can all affect the performance of signal shields. In open and open areas, signal shields may be more effective than in enclosed buildings.

Technical feasibility: Some advanced signal shields may have a wider range of shielding frequencies and a longer shielding range. Simple devices may only be able to block signals in specific frequency bands and short distances.