8dB (10dBi) Sierra AT&T; Elevate 754S Hotspot External Antenna w/OEM SMK TS-9 Adapter Cable. Our Military Grade Magnetic Mount External Booster Antennas - Approved / Purchased by US Army, US Navy, US Air Force, US Marine Corps, Department of Homeland Security, Bureau of Alcohol, Tobacco, Firearms & Explosives and Other Federal, State & Local Agencies Nationwide / Worldwide!! Portable Design Allows Use On Vehicles / Boats / Trucks / RV's / Home / Office / Camps etc. - Use It Anywhere!! Place Antenna on Metal Surface.  Not For Use In Areas With Less Than 2-Bars Signal Strength.  Nationwide Service - Lifetime Warranty!!