Mobile phone signal jammer

Mobile phone signal jammer is mainly aimed at all kinds of places where the use of mobile phones is prohibited, such as various examination rooms, schools, gas stations, churches, courts, libraries, conference centers (rooms), theaters, hospitals, governments, finance, prisons, public security, and military centers. It is understood that mobile phone signal jammers currently on the market can limit mobile phone signals that are 500M meters away from the launching station and have a radius of >20 meters. The shielding radius is adjustable. It only shields the mobile phone signal without affecting other electronic devices. Save energy, the power is 20W-480w.