1,support USB FLASH and SD card,play mp3 format music 2,with FM radio 3,Built-in rechargeable lithium battery 4,AUX function Name:USB/SD SpeakerSpecification ... functions:1,Standard USB2.0 plot,could read SD/ SDHC / MS/ MMC card and USB Flash and play MP3 format music automatically and ... function.6,AUX function.Standard 3.5mm audio output jack. USB Speaker with FM radio