Military-Grade Jammer B57 has the same features as its predecessor B56, therefore it jams 3G Cell Phones, VHF UHF Radio Frequencies, WiFi WLAN, Bluetooth, etc. The only features for which this military jamming device differs from its predecessor are its amount of output power and, of course, frequencies inhibited.
It also makes an excellent solution for military or police convoys, military drills, inhibition of communications during illegal demonstrations and congregations or within prisons.
Below, you can find further details, such as frequency options, etc.