its Shure to be sure.. This Shure product has been designed to conveniently extend the SE series earphones without having too much cable. Will work with all Shure SE Series earphones & also all headphones & earphones using the standard 3.5mm stereo minijack connector. The Shure EAC3BK Extension Cable is a high quality durable extension cable which will extend your headphone cable by 91cm. It has a 3.5mm jack input on one end & on the other a 3.5mm jack plug ideal for those wanting that little extra length. Summary Does exactly what it says on the tin extends your 3.5mm mini jack headphone cable by 91cm! Features 91cm (36 ) extension cable for sure headphones. Works with all headphones with a standard stereo 3.5mm mini jack plug Good quality reliable & durable designed to extend Shure headphone cables without having too much extra cable