First custom earphone in the world with a single 14mm dynamic driver couples with advanced frequency suppression technology (FST). Frequency Response: 10-20000 Hz Impedance：16ohms（including cable） Sensitivity (at 1kHz)：116dB spl (1mW) Important: Due to the size of the driver, people with small ears may not be able to fit. We would need your ear impressions to check for sizes...
elago E7 ARMATURE In-Ear Noise-Reducing Earphones (Compatible iPhone 4, 1G/3GS; Control-Talk with Built In Microphone)
elago E7 ARMATURE In-Ear Earphones, Enjoy the deep bass and high definition sound quality that is pure elago, E7 Control - talk has a built in. feature for use with music phones and newer iPhone. The control talk cable has a call answer button and microphone so you can easily switch between listening to music asn talking on your iPhone.