5200 Miles Digital TV Antenna Indoor HDTV 1080P 4K Amlified Signal Booster USA Read These First: 1.Before using it, please determine if your TV is a smart TV or a TV without an HD tuner, if it is a smart TV, you can use the antenna directly, if it is needed for a TV with an HD tuner, it is a digital converter box that is needed before you can use it. (You can refer to the picture introduction) 2.When the antenna is installed, you need to rescan the channels so that you can sync the previous channels to the new antenna.