1. Play USB/TF card in the mp3 audio file 2 External audio input 3.External power charging interface 4 FM auto sacn radio 5.Speaker with wireless autodyne system TECHNICALSPECIFICATION: 1.Input DC-5V 2 Built-in Battery 3Frequency Response 150-18000hz 4. Power Output Rms 8W=the 10% 5.FM 87MHz-108MHz