Eachbid 1M 3FT 3.5mm Male to Female Stereo Audio Extension Cable for Earphone PC Soft,Gold-plated interface, distortion rate is low It is audio extension cables,usually used on PC,Walkman,iPad,iPhone,Mp3,Mp4 or CD. The cable connects 3.5mm Male to 3.5mm Female. Cable Length: 1M-3Ft