Compatible with any portable cellular telephone on the market.4db gain in horizontal phone.3db gain in vertical plane.Easy installation.Cordless operation no cable hookup.No power hookup.Istallation:Put the antenna on the surface that has been cleaned of oil dust dirt and wax.Fix the antenna with Wrench.The ideal place to mount the antenna is the top center of the rear window of your car.Installation on the side window or the front windshield is not recommended and will not enable the device to work at its fullest capacity.Package Include:1 x Car Antenna