MEElectronics Clarity Series Ceramic In-Ear Headphone with In-Line Microphone/Remote for iPhone and Smartphones -Black0 (Discontinued by Manufacturer) Inline microphone supports hand-free talking for iPhone, and many mobile phones Ceramic housing that is acoustically inert, eliminating resonance for more accurate sound Powerful yet balanced full-range 6.0 mm micro-driver delivering high levels of accuracy and dynamics Driver: 6.0 mm micro-drivers Frequency Response: 18Hz  20KHz