1.Cake speaker for apple iphone, ipad,ipod 2.No power needed 3. ... more nice3.No power or batteries required, simply plug the speaker into your player4.Connect to laptop,PC,Mobile Phone,Ipod ... power 2wfrequency response 200Hz-5kHzimpedance 8Ωresponse 97dBPackage: Cake Mini Speaker for apple iphone,ipad,ipod.PC,MP3,MP4,MD,CD ...