8 Bands Cell Phone Jammer Portable Wifi Cdma/Gsm Gps 3g 4g Blockers

8341-D8 enhanced signal shielding device, unique customized high gain antenna, high efficiency management chip shielding only shields effective signal reception, this machine high gain antenna coverage, can be 10-30 meters (depending on the base station signal strength) The shielding range is shielded against the operator’s dual-mode 2G, 3G, 4G, GPS, WIFI and other signals, so that all communications within the shielding range are completely disconnected from the outside world; the communication network is reflected as no network or no signal, no service . With the development of science and technology, the leakage of mobile information, telephone detonation bombs, serious areas, etc. have caused social harm; due to the continuous enhancement of the coverage of the current signal, the shielding effect of the shielding device is poor. This machine has been proved through many experiments. Reach the best distance; we use imported chips to improve efficiency and high-gain antennas to enhance coverage.This 8 bands 4g blockers as cell phone jammers offer users best experience.