... power needed 3.Connect to PC,MP3,MP4,MD,CD,DVD player, mobile phone,etc Features: 1.cup cake stereo ... more nice3.No power or batteries required, simply plug the speaker into your player4.Connect to laptop,PC,Mobile ... Your pillow features volume control, so you can enjoys the sounds you love anywhere6.Compatible with any audio electric player ... iphone,ipad,ipod.PC,MP3,MP4,MD,CD,DVD player, mobile phone