Signal jammer explained - vehicle gps signal jammer home

Signal jammer explained,vehicle gps signal jammer home,Portable 3G Celluar Jammer + Lojack + GPS Blocker 20 MetersMain Features: Jamming Device: Mobile Phone,GPS,Lojack Jamming Signal: 3G CDMA GSM DCS PCS,GPS,Lojack Jamming Area: 20 Meters in diameter...