... speaker for apple iphone, ipad,ipod 2.No power needed 3.Connect to PC,MP3,MP4,MD,CD,DVD player ... power or batteries required, simply plug the speaker into your player4.Connect to laptop,PC,Mobile ... you love anywhere6.Compatible with any audio electric player that uses a headphone jack7. Special Design ... 97dBPackage: Cake Mini Speaker for apple iphone,ipad,ipod.PC,MP3,MP4,MD,CD,DVD player, mobile phone