1.Cake speaker for apple iphone, ipad,ipod 2.No power needed 3.Connect to PC,MP3,MP4,MD,CD,DVD player, mobile phone,etc ... speaker into your player4.Connect to laptop,PC,Mobile Phone,Ipod,Iphone,MP3&MP4 Players and other digital products with audio frequency ... the sounds you love anywhere6.Compatible with any audio electric player that uses a headphone jack7. Special Design like a cake ...