Dual Band RV/Trucker Cellular Antenna with 3 Way Mount- 800-1900 MHz Wirth 10.5" coax with FME Female Connectors (Mount Sold Separately) is 21.5 Inches including spring Mount with a built in ground plane. The Antenna gain is 5.12 dBi 806-894 6.12dBi 1850-1990 MHz, is 50 ohms and is designed for RVs but works great on Trucks as well. Call our fully staffed Tech Department for questions or help at 866-294-1660.