Exterior Omni-Directional Antenna</br>FME-Female Connector (50 Ohm)</br>3 dBi Gain</br>Dual Band 2G?? 3G (850 and 1900 MHz)</br>6"Magnetic Roof-Mount Antenna for Vehicles</br></br>Product Description</br></br>Dual Band 6 inch Magnetic Roof-Mount Antenna for Vehicles with SMA-Male Connector for use with SureCall Cell Phone Signal Boosters.</br><br/>http://www.amazon.com/gp/product/B0076CHCECo