As the world’s first high-power desktop mobile phone signal jammer, the output power per channel is up to 25W, and it can also shield GSM, CDMA, DCS/PCS, 3G, 4G, Wi-Fi, GPS, 5G WIFI. This cell phone jammer can meet your target most common cell phone frequencies. High power, large coverage, up to 150 meters. Good cooling system with 11 cooling fans inside. There are 4 temperature-controlled fans on the host, and the fans will not work immediately when the jammer is activated. After the surface temperature of the main unit rises to 50°C, the temperature-controlled fan will automatically start running to ensure the stable operation of the jammer. It’s perfect for school classrooms to avoid cheating on exams and oil/gas stations to keep safe. The output power of each frequency band can be adjusted according to your requirements.