1.Aluminium alloy materials with FM . 2.Subwoofer and LED screen. 3.Support TF,USB, ... ,PC and Mobile. 4.speaker unit 1.5"x1 1.Aluminium alloy materials 2.RMS ;3W x 1+subwoofer+LED screen3 ... ;TF card, U Flash Disk,FM,MP3,mobile and computer with 3.5 jack4.Li-ion battery;BL-5C5.Speaker unit ...