1.To play MP3 files in the SD card and USB flash disk
2.External audio input
3.External audio output
4.Built-in battery

1.To play MP3 files in the SD card and USB flash disk                                                                  2.External audio input  3.External audio output  

4.Built-in battery 

5.Verstile remote operations

6.External power,charging interface   

7.FM auto scan radio      

8.LED digital display   

9.With alarm and clock