The 301103 is Wilson’s best-selling Magnet Mount Antenna which improves signal on any vehicle with a steel exterior, including automobiles, pickup trucks, vans, SUVs. They are easy to install and transferable between vehicles.  This connector is a FME-Female. 
 
Product Details
 
 
Dual-Band 800MHz & 1900MHz
Compatible with all Cellular and PCS users
Easy to install
Easily transfers from one vehicle to another
Strong rare earth magnet
Metal ground plane required (minimum 8" diameter)
10 to 15 times more signal than a cell phone used inside vehicle without an external antenna