30-40 Meters jammer
The jammer can usually interfere with a variety of frequency bands, and the interference range can reach up to 40 meters, covering all mobile phone signals, GPS signals, WIFI signals, and walkie-talkie signals. And the prices are usually cheap. So it’s a very popular device. It’s also by far the most purchased shielding device, not just for desktops, but handhelds, and it’s available in a variety of styles.