Portable mini Speaker 1.Portable Speaker 2.can use the USB,SD,MMC card with MP3,MP4,Mobile,FM 3.frequency87.5-117MHZ. ... can use the USB,SD,MMC card with MP3,MP4,Mobile,FM,the product including the Lithium battery,a remote ... play SD / MMC card directly* U disk in the MP3 format * do not need switching* with memory automatically read, ... interface and Nokia charging interface. Mini Speaker with FM/MP3/MP4