To ascertain the capability of a mobile phone signal jammer to offer complete wall-to-wall shielding, it is imperative to examine different circumstances.

Take a moment to examine the mobile phone signal shielding device itself. This device emits a radio frequency signal that is specifically targeted at mobile phone signals. As this signal encounters obstacles in its transmission path, it undergoes attenuation. The degree of attenuation varies depending on the nature of the obstacles it encounters. For example, when faced with an entire steel-concrete wall or a brick-concrete wall, as well as a reinforced concrete wall followed by two consecutive brick-concrete walls, the signal is capable of effectively blocking small and medium-power mobile phone signals. The radio frequency signal emitted by the device is attenuated, thereby preventing the shielded mobile phone signal from penetrating through the wall. It is important to note that the shielded mobile phone signal, being a wireless signal, lacks the ability to pass through obstacles and reflect.

Mobile phone signals can be blocked to different extents depending on the type of wall material used. For instance, walls made of light steel keel gypsum board or glass, as well as wooden doors, offer lower levels of attenuation. Additionally, even when the mobile phone signal is blocked, it can still affect the space behind the wall through open doors and windows or by reflecting and refracting off the wall, creating a false perception of the signal-blocking device having the ability to penetrate.

A signal jammer with a protective metal casing.

Does the utilization of a metal casing enhance the performance of this signal jammer?

Initially, let's delve into the advantages offered by this specific signal jammer.

With its simple yet effective structure, the aluminum profile excels in dissipating heat. Widely recognized as the preferred material for heat dissipation, it boasts remarkable performance in this aspect. Additionally, the heat dissipation teeth of the profile can be customized into diverse shapes, enabling seamless integration as the protective shell of a signal jammers. This not only adds to the product's visual appeal but also highlights the meticulous craftsmanship involved.

The affordability of aluminum profiles stems from their high production volume and extensive usability. This, in turn, significantly diminishes the material expenses involved in manufacturing signal jammers. Moreover, it eliminates the necessity for a dedicated housing, thereby reducing costs even further.

Next, we shall discuss the negative aspects of signal jammers that come with metal casings.

The product's unappealing appearance stems from its metal casing and the direct screwing of external antennas onto its body. To ensure comprehensive signal blocking for 2G, 3G, 4G, 5G, and WIFI, a mobile phone jammer requires a minimum of 10-12 frequency bands, which translates to the need for 10-12 antennas. Consequently, the device takes on the resemblance of a hedgehog, devoid of any aesthetic charm.

The metal casing, functioning as a radiator, is designed to dissipate a substantial amount of heat generated by the signal shield during extended operation. Consequently, the temperature of the casing rises rapidly, and at times, the surface temperature can even reach 60-70 degrees. It is crucial to refrain from direct contact with your hands to prevent the possibility of burns.

Using a mobile phone signal jammer through walls is not recommended, whether it is a high-power or small-to-medium-power device. The main reason behind this is the lack of guaranteed shielding effect. Therefore, it is advisable to install the mobile phone signal blocking device in a location where the need to block mobile phone signals arises, rather than relying on its usage through walls.