Cellphone Jammers, Mobile Phone Signal Booster, Prison Jammer manufacturer / supplier in China, offering 50-100m Wide Range Backpack Signal Jammer with 120W High Output Power Can Jam 2g, 3G, 4G WiFi, GPS Networks for Security, Compact Tactical Signal Jammer – Rechargeable Sweep Jamming Device for Mobile, GPS Wireless Signals, 8 Antenna Handheld Signal Jammer Blocks WiFi 2.4G/5.8g GPS 2g/3G/4G Walkie Talkies and so on.