... Magnet *Large Capacity Rechargeable Li Battery High Quality Mini Nr-Fe-B USB/SD Card Player Voice Amplifier K8300Product Features *Mini ... magnet speaker,high sensitivity and instant response. *Multifunctions: Set USB, SD card port, microphone, speaker, voice amplifier, karaoke.*SD/MMC Card and USB ... CMN.W.: 16kgsG.W.: 17.8kgs High Quality Mini Nr-Fe-B Magnet USB/SD Card Player Voice Amplifier K-8300