... Li Battery High Quality Mini Nr-Fe-B USB/SD Card Player Voice Amplifier K8300Product Features *Mini Portable, USB ... /SD card multifunctions*streamline appearance, ergonomic body design *Nd-Fe- ... instant response. *Multifunctions: Set USB, SD card port, microphone, speaker, voice amplifier, karaoke.*SD/MMC Card and USB support mp3, Ipod ...