This device will jam GPS  L1 signals up to a distance of  6 metres   It simply plugs into an ordinary car cigarette lighter socket and is active immediately blocking all types of tracking and navigational devices.                                                                             
Only GPS jammers will prevent the GPS loggers and GPS/GSM devices to get GPS positions from the Satellites

Specifications:
Effective range: Up to 6 meters radius
Input power: 12.0v DC via cigarette lighter socket
Output signal strength: 200mW
System: All systems worldwide
Signal source: synthesized
Operation temperature: -10c to +50c
Humidity: 5% to 80%
Size: L 110 x W 62mm approx
Weight: 140gm