... TF card and MP3/WMA(Optional) file format3) .Support FM Radio, Crystal clean treble4).Compatible with laptop,iPod, MP3, MP4, MP5,cellphone ... :Power:USB, Lithium BatterySignal transfer:AUX in 3.5mm,USB ,TF card& FM radio Output:3W x 2 Color:Silver/Black ... Function Sport Music--Compatible with laptop,iPod,MP3,MP4,MP5, cellphone,PSP etc. via 3.5mm audio cable