Music format: MP3/WMA 7 colors backlight; high speed USB1.1 port; Built-in FM Radio (optional) ID3(Synchronized display of song names and its related lyrics); 16 languages A-B repeat function AAA battery, playing 8 hours Size:80x27x25mm Weight: 35g(without battery) Package Dimension:16.5*12*4.5cm Carton: 46*35.5*26cm 40pcs/carton G/W: 11kg N/W: 10kg