Koss KE29S Isolating Earbud (Silver) (Discontinued by Manufacturer) Lightweight, in-the-ear earbud design for music on-the-go. Dynamic element for extended frequency response of 15-20,000 Hz Straight dual entry 4 foot cord with inline volume control Convenient carrying case for protective storage Includes S, M and L silicon ear cushions for customized fit Features A Dynamic Element Positioned Just Outside The Ear For Extended Freq Resp Freq Resp: 15 Hz-20 Khz Freq Resp: 15 Hz-20 Khz,Imp: 16_