1,Output power: 3W 2,Built-in FM radio 3,Usb cable &Lithium battery powered 4,Small and sample design Function List: [Fashionable] Multi-function integrated design, compact portable, full-featured, enjoy music life[TF Card / U Disk] Built-in MP3/WMA decoding, can directly play TF card, U disk, mobile and other USB storage devices stored MP3, WMA format music files[FM Radio] Built-in FM Radio, ...