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8 Channels Vehicle Mounted Car Drone Defence Jamming Blocking Device Anti Jammer. High Gain Antenna: Features 17dBi directional antenna for enhanced communication strength. Wide Jamming Range: Effective blocking distance from 300 to 800 meters. Continuous Operation: Equipped with cooling fan design for 24/7 working capability. Weatherproof Design: IP65 waterproof rating with lightning protection for outdoor use. Full 360 Coverage: Provides complete 360-degree air defense area. Adjustable Frequencies: Supports adjustable bands from 400MHz to 5350MHz. OEM Manufacturing: Factory direct with 17 years of OEM experience in Shenzhen. Multi-Application: Ideal for prisons, oil refineries, government, and schools.