Wilson Electronics 4-inch 4G Mini Magnet-Mount Antenna w/ FME Female Connector Compact & Low Profile Easy To Install Removable transfers From 1 Vehicle To Another Features Rare Earth Magnet Minimum 3.5" Metal Ground Plane Required Compact and low profile Easy to install Removable transfers from one vehicle to another Includes Rare Earth Magnet Minimum 3.5 inch metal ground plane required