The Vehicle GPS jammer with USB port can protect the car drivers from the GPS tracking device in range 5-10 meter.
With this WiFi 2.4G Portable Phone Signal Jammer, it can keep a 5-20 meter area from the phone wifi gps signal etc.
The Glonass GPS Truck Portable Phone Jammer is a 6 channel handheld signal jammer in range 5-20 meter.
This 10 channel Mobile Phone Signal Jammer is usually applied in examination room and office room for Phone WIFI signal jamming in range 5-40 meter radius.
The Portable Galileo Car Vehicle Phone Jammer is a 5 channel handheld tactical signal blocker especially for GSM CDMA GPS LTE band.
The Portable GPS GSM 1.2G Phone Jammer can shield 4 kinds specific signals at same time in range 5-20 meter.