In This Way, The New Mi Portable Bluetooth Is Made Up Of A Double Magnetic Unit With A Fibre Diaphragm And A Passive Radiator, Resulting In An Extraordinary And Immersive Sound, With Clear Medium And High Frequencies And Really Clear Music you Can Enjoy Your Music In Three Ways, The USB Mode, The Tf Card (SD Card Slot) And The Aux Input Mode That Allows You To Connect The Speaker To An External Source E.G., Phone, TV. It Comes With An Antenna For You To Enjoy Your FM Radio Without Struggling With The Signal.