There are a lot of jamming products in the markets, but most of them can obstruct only one or two frequency ranges. So if you are in need of one that can disturb more frequency range, this High Power 6 Antenna WIFI 2G and 3G Cell Phone Jammer is an ideal one. This Jammer is the most strong and efficient solution to interfere can absolutely interfere with WiFi, 2G ,3G and Cell Phone signal. 

With a 12 Watt output power this jammer has the ability to blocks even the strongest signals. The working distance of this jammer is 30 meters, it that means if the WIFI, 2G and 3G Cell Phone are within this distance, they would have no signals. This one can block signals of 6 frequency ranges.