Reviews: 5 Antenna Portable Signal Blocker for GPS,Wifi,GSM,CDMA,3G,DCS

recommend rating

That signal jammer is rather cheap, in comparison with other GSM/GPS blockers and it works fine. What else do I need to worry about when it comes to a jamming device? I do not need a stylish device, that is able to block literary anything, or with a huge working range, I just need it to work and with a reasonable price. That's what that jammer really is.