... 2.No power needed 3.Connect to PC,MP3,MP4,MD,CD,DVD player, mobile phone,etc Features ... : 1.cup cake stereo speaker2.Make office, home or study life more nice3.No power ... or batteries required, simply plug the speaker into your player4.Connect to laptop,PC,Mobile Phone,Ipod,Iphone,MP3&MP4 ... like a cake Specifications: output power 2wfrequency response 200Hz-5kHzimpedance 8Ωresponse 97dB ...