Jammer, Cell Phone Jammer, Prison Jammer manufacturer / supplier in China, offering 30W 700-850MHz Anti Drone Signal Jammer Module System GPS Blocker, 50W 500-600MHz RF Power Amplifier Module Jamming PA GaN Drone Anti Drone Module, 12 Antennas Jammer Blocking 2g 3G 4G 5g GPS WiFi Frequencies and so on.