Make sure your cell phone signal jammer has a very weak electromagnetic signal strength, rest assured that the test data shows that this signal strength is far from harming the human body. At the same time, the signal jammer of the mobile phone blocks only the forward signal of the phone, so the wifi jammer phone cannot connect to the base station and the phone itself is not damaged. Is there a difference in the distance used between mobile phone signals and outdoor devices? Yes.
The effective distance of a mobile phone signal jammer (30-40 meters) generally refers to indoor distance. In open outdoor areas, the effective distance of the shield up to several hundred meters. It should be noted that the effective distance of the shield, whether indoors or outdoors, is related to general environmental conditions such as distance from the base station and location. Therefore, the use of mobile phone signal jammers requires careful consideration of this factor in order to avoid blocking blind spots, which affects the shielding effect.