Koss iSpark iPhone Stereophone (Black) Specifically designed for the iPhone, this unizue portable earbud uses ear cushion material which forms slowly in the ear canal providing a custom fit Microphone and push-to-talk button allow you to stop listening to your music and answer your phone. Dynamic element for better frequency response - 10-20,000 Hz and dynamic noise reduction microphone. Includes one spare pair of large size memory foam earcushions and a convenient carrying case for protective storage Straight, dual entry 4 foot cord