portable 8 antennas signal jamm ers shields cellphone 2g 3g 4g gps wifi lojack signal isolator

this 4w high power cellphone gps wifi jamm er is intended to fit your need once and for all. you may choose any one band of them y without any unnecessary influence on another. when you have such device in your hands, there is almost nothing that can hurt your privacy or break the secrecy of your location within 15 meters radius around you. even the most advanced tracking, eavesd ropping, wiretapping and other anti privacy technologies are unable to work properly when they are in the working range of this product.syi