Drone Defense, Drone Detection manufacturer / supplier in China, offering Drone Detector Detection Distance Warning Fpv Drone Alarm Handheld Terminal 1-5km Detection Scope, Cross-Border Uav Detection Device: 0-6GHz Sweep, 2.4G/5.8g Focus, Bilingual Operation, Uav Detection System Range 4km, Equipped with Black and White List Real-Time Positioning Equipment, High Quality Products and so on.