Cellphone Jammers, Mobile Phone Signal Booster, Prison Jammer manufacturer / supplier in China, offering Portable Vehicle-Mounted Uav Jammer with 50W Max Output 800m Interference Distance, Professional Fpv Drone Blocker 50W Adjustable Power 6-Channel Customization 800m Interference Distance, Vehicle-Mounted Fpv Drone Jammer 800m Max Range 30-50W Adjustable Power and so on.