... Digital Portable Jammer RF Signal Shield/Blocker Frequency Band (MHz) Product DescriptionDZ101L is middle RF power man-pack jammer, accurate ... Cease function for incorrect using way, system fault, high working temperature, high VSWR... 3. With DDS module, output power adjusting ... for both sides. 20-3000MHz 530W High Power Man-Pack Vvip Jammer, Digital Portable Jammer, RF Signal Shield/Blocker