20-3000MHz 530W High Power Man-Pack Vvip Jammer Digital Portable Jammer RF Signal Shield/Blocker Frequency ... & Auto Cease function for incorrect using way, system fault, high working temperature, high VSWR... 3. With DDS module, output power adjusting per ... N-male connectors for both sides. 20-3000MHz 530W High Power Man-Pack Vvip Jammer, Digital Portable Jammer, RF Signal Shield/Blocker ...