... Rechargeable built-in lithuim battery OEM&ODM oders accepted CE&FCC&ROHS certified Vibration Speaker with Rechargeable Li-batteryFeaturesMini vibration SpeakerMagic 360 ... unimpededRemote controlCan read TF cardBuilt-in rechargeable Li-ion Battery.Audio Source: PC,MP3,MP4,MID,CD,DVD,Mobile ... ,another for USB cable)User manual Vibration Speaker with Rechargeable Li-battery