Although this type of jammer looks a little bulky,But It can effectively jamming 2G 3G 4G cell phone signals. In addition to mobile phone signals, the device can also block GPS, WiFi and other signals. 18W power , jamming range up to 40 meters. Is a very cost-effective jamming device. At present, there are very few jamming devices that can interfere with 5.8G. If you have the need for this, this device is the best choice Note: The WiFi and 5G frequency bands in each country are different. When buying, you need to pay attention and place an order according to the frequency band of your country.